The things you should be aware of :
http://wowwiki.wikia.com/wiki/Patch_0.9
-Holy Resistance has been replaced with Arcane Resistance. (nostalrius still have holy resistance)
http://wowwiki.wikia.com/wiki/Patch_0.10
-Dragon's Call now summons one level-55 Emerald Dragon Whelp instead of three level-40 ones.
-You can't duel players you can attack normally. (this is regarding horde) (nostalrius you can duel) .
http://wowwiki.wikia.com/wiki/Patch_1.1.0
-Armor can't be swapped out while in combat. Other equipment such as weapons and accessories can still be swapped out.
(this make assumptions that neck,fingers,librams,trinkets,offhands) should be able to switch during combat since all those are accessories.
http://wowwiki.wikia.com/wiki/Patch_1.2.0
-Players will now receive credit for killing a monster even if they die during battle. (i have noticed that we don't).
-The damage effect from Circle of Flame no longer gets increased by items with fire bonuses.
-Macros that cast spells will show spell feedback (e.g. cooldowns, etc.) on the action bar. (i didn't notice this here but it's assumption only) .
http://wowwiki.wikia.com/wiki/Patch_1.2.2
-Seal of the Crusader: Fixed a bug where damage per swing was increasing instead of decreasing when Seal of the Crusader was active.This resulted in a dramatic increase in damage per second (DPS) that was unintended. The tooltip for the spell displays the intent of the spell:
"Fills the Paladin with the spirit of a crusader, granting additional attack power. The Paladin also attacks faster, but deals less damage with each attack."
The overall increase in DPS from Seal of the Crusader should only result from the increase in attack power and not from the increase in attack speed. We understand this is a significant decrease in the power of this spell, but was a necessary bug fix to ensure both overall game balance and the viability of different Paladin Seals.
-Horde and Alliance members cannot duel with each other regardless of realm type. (in nostalrius we can duel) .
http://wowwiki.wikia.com/wiki/Patch_1.3.0
Meeting Stones
Meeting Stones are located outside of each dungeon to help players find a group to adventure with in the dungeon. The meeting stone will try to find you a viable five-person group by looking for a tank, a healer, and so on. As time passes and you are unable to find a group, the meeting stone will become less picky about who it groups you with.
(i have never ever seen any meeting stone in nostalrius to do this job) .
-Seal of Command - The damage effects can now be resisted instead of dodged, blocked, or parried. (i am not so sure why this was set by blizzard patch when things work differently) .
http://wowwiki.wikia.com/wiki/Patch_1.4.0
-Abilities which do an additional percentage of weapon damage now include attack power as part of the base weapon damage. (this is for seal of command)
http://wowwiki.wikia.com/wiki/Patch_1.5.0
-Players can no longer swap inventory gear while dueling.
-Meeting Stones have had their rules for what players are grouped with what other players relaxed. This means groups who use meeting stones (or innkeepers) should have their groups formed much more quickly than they were previously.
http://wowwiki.wikia.com/wiki/Patch_1.6.0
PvP
-Players rank 11 or higher can now chat in the WorldDefense channel.
-The WorldDefense and LocalDefense channels will now display your rank as well as your name when chatting.
-You are considered in combat for the entire duration of a duel. (apparently in nostalrius people runs out of combat) .
-Consecration - No longer resets weapon timer when cast.
-Fixed a bug where Seal of Command prevented other On Hit weapon effects from occurring.
-Players now receive an error message if they try to join a meeting stone queue and are in a raid or are not the party leader.
http://wowwiki.wikia.com/wiki/Patch_1.6.1
-The Oil of Immolation effect is no longer affected by bonuses to spell damage from items.
http://wowwiki.wikia.com/wiki/Patch_1.7.0
-The debuff limit has been increased to 16 (from 8). In addition, the client will now display all 16 debuffs.
-Switching weapons in combat triggers a 1 second global cooldown for all abilities for rogues and a 1.5 second global cooldown for everyone else.
-Fixed bug where you could kill someone in a duel with spell reflection.
-Effects that make players immune to physical will no longer be immune to the "Recently Bandaged" effect from First Aid.
-Meeting Stones
.A number of miscellaneous improvements have been made that should allow for better group forming when using the meeting stones.
.You will no longer be kicked from the meeting stone queue when a player declines a group invite or when inviting someone that is already in a group.
.You will now be informed that you have left the meeting stone queue when the group leader logs out.
.Tanks and Healers will now be immediately added to the group by the meeting stone when they are the 5th member of the group.
.You can now be added to a group by the meeting stone when that group contains characters that have disconnected.
-Consecration and other similar spells can no longer be used by non-PvP flagged players to damage PvP flagged enemies.
-The Lawbringer Paladin Set's Healing Circle effect now only affects your party, but the range of the heal has been increased to 30 yds.
-The duration of the Bonereaver's Edge weapon debuff has been lowered, but the frequency of the effect has been raised.
-Fixed bug where moving enchanted weapons from one hand to the other would remove the equipped enchantment benefit.
-Fixed bug where swapping two equipped trinkets would remove one of the trinket's passive effects.
-The tooltip for spells like Seal of the Crusader correctly reflects the benefit of the spell, instead of occasionally being off by one.
-If you omit the rank of a spell in /cast or CastSpellByName(), it will use the highest rank of the spell which you know.
http://wowwiki.wikia.com/wiki/Patch_1.8.0
-Instant Attacks
The mechanics of most instant melee attacks have been modified to improve item balance. Previously, instant melee attacks did damage based on the damage range of the weapon, plus a bonus for the player's attack power. This bonus was then multiplied by the speed of the weapon. As a result, slow weapons did more damage than was intended, and fast weapons were considered inferior by most players. We have changed the way the attack power bonus is calculated for instant attacks. This change does NOT affect attack power calculations for normal melee attacks. Instead of multiplying by the speed of the weapon, the attack power bonus is now multiplied by a fixed number pulled from the following table:
Two-handed weapons: 3.3
Daggers: 1.7
All other one-handed weapons: 2.4
.As a direct result of this, many weapons have shifted position in their relative power. In particular, many Epic (purple) quality items are now more powerful than slower Superior (blue) weapons.
.This change was not made to reduce the power of instant attacks, but to correct the relative imbalance of weapon itemization. At a given level requirement, epic quality weapons should always be more powerful than superior quality weapons.
.Please also note that all normal weapon swings will be completely unaffected by this change. The following abilities are affected by the design change: Sinister Strike, Ambush, Backstab, Whirlwind, Mortal Strike, and Overpower.
-Judgement of Light and Judgement of Wisdom will now benefit players that are immune to Holy effects (e.g. Divine Shield).
-The Thunderfury effect's spell damage will no longer be increased by other item effects.
-Chromatic Gauntlets no longer has a listed Holy Resistance bonus, since there is no actual Holy Resistance.
http://wowwiki.wikia.com/wiki/Patch_1.9.0
-On-next-swing abilities will no longer cause multiple weapon procs on a single swing.
-Judgements - Judgements that place a debuff on their victim will now all have their duration refreshed when the judging paladin strikes the victim with his or her melee swings. All these debuffs have had their duration decreased to 10 seconds. In addition, Judgements that place debuffs can no longer be resisted.
-Seal of Righteousness - Now does holy damage on every swing. It can now proc correctly as well. The Judgement effect has been renamed "Judgement of Righteousness" to differentiate it from the Seal damage in the combat log.
-Judgement of the Crusader - The holy damage bonus has been decreased as part of rebalancing paladin damage (which is still increased overall).
-Seal of Command - The proc will occur more often, but will only do 70% of weapon-swing damage.
-Judgement of Command - Instead of placing a debuff on the victim, this spell now does immediate damage. If the victim is not stunned, they only take 50% of the total damage. The damage on this Judgement was increased significantly.
-Vengeance - Special ability critical hits can now trigger Vengeance.
-Judgement of Righteousness - The damage of this judgement was increased significantly. This judgement can now trigger procs. The bonus from spell damage items has been increased slightly.
-All Seals and Judgements have had their bonus coefficient from plus spell damage re-evaluated. Some holy damage effects had no coefficient before and now have a coefficient.
-Consecration - No longer displays a debuff icon on targets in the area of effect.
-Seal of Righteousness - The damage bonus from +Holy damage has been reevaluated on this seal. Since the damage is delivered on every swing, the bonus has been reduced. However, paladins attacking with faster weapons should see an overall increase in the bonus from + spell damage gear. Mana Cost slightly increased.
-Seal of Command - Damage bonus from +Holy damage items slightly increased.
-Blessing of Wisdom - Mana regeneration over time will no longer generate threat.
-The Lifestealing enchantment now does shadow damage rather than fire damage.
-The attack speed slowing effect from Thunderfury has been reduced to 20%, and no longer stacks with other such effects such as Thunderclap. The rate at which the weapon procs has also been lowered.
-The Force Reactive Disk's and Cloak of Fire's effects will no longer gain a benefit from effects that increase spell damage. (sorry paladins but is true this and reason why i have never used them)
-Incorrect amounts of abilities such as Attack Power, Increased Fire Damage, or Increased Healing Damage were being applied to all random item property world drops. Two handed weapons such as Staves had much lower amounts of these abilities, while ranged and one handed weapons had too much. All further drops of these items will have the correct amounts, but previously dropped items will not be affected by this change.
http://wowwiki.wikia.com/wiki/Patch_1.9.3
-Eye for an Eye - This talent will now still do damage when the paladin is stunned. In addition, if the critical hit kills the paladin, damage will still be dealt to the spellcaster.
-Greater Blessing of Sanctuary - Paladins with Righteous Fury will now generate extra threat correctly when this Blessing procs.
http://wowwiki.wikia.com/wiki/Patch_1.10.0
-Passive damage effects like Oil of Immolation will cause creatures to attack when they are hit.
-Blessing of Light - Different ranks of this spell were stacking without causing additional effect. It was never intended for them to be able to stack, so they can no longer stack.
-Righteous Fury - Righteous Fury will now always generate the correct amount of additional threat on all holy damage. There were some abilities, such as Retribution Aura, where this did not work correctly.
-Holy Shield - Mana cost reduced approximately 15%. The effect now has a small bonus coefficient from spell damage items and effects.
-Eye for an Eye - This talent can now trigger while you are mounted.
-Seal of Command - Will now be able to proc when the Paladin is silenced.
-Improved Seal of Righteousness - Tooltip updated to reflect actual functionality. This talent increases Seal of Righteousness and Judgement of Righteousness by 3-15%.
-Holy Shield - Tooltip updated to reflect that damage caused by Holy Shield causes 20% additional threat. This has been active since 1.9, but was undocumented.
-Most creatures that were previously immune to Scorpid Sting are now also immune to the Paladin Talent Vindication.
-Fixed problem where occasionally repeated casts of Consecration will not deal damage.
-The tooltip on Thunderfury has been clarified to indicate that only the primary target will receive the slowing effect. In addition, the two effects have been broken down into two different debuffs to prevent incorrect information from appearing in the debuff tooltip for secondary targets (previously secondary targets were told they were slowed when they were not actually slowed).
-The charges from the Zandalarian Hero Charm will now be consumed by melee and ranged abilities and spells which do non-physical damage. This includes: Hammer of Wrath, Judgement of Righteousness, Seal of Command, Judgement of Command, Volley, and Arcane Shot. The trinket will also now burn charges from each casting of a damage over time spell, heal over time spell, and area aura spells such as Blizzard and Consecration. Only one charge will be burned per area spell cast, rather than multiple charges per target hit as was previously the case.
-The damage dealt by Demonic Rune and Dark Rune will no longer be affected by the user's increased spell damage items.
-The Bonereaver's Edge's triggered effect has been changed. Instead of lowering your victim's armor, it will cause you to ignore a portion of your victim's armor. Its triggering rate was substantially increased as well as the magnitude of the effect. In addition, the item now has 16 stamina.
http://wowwiki.wikia.com/wiki/Patch_1.10.1
-Fixed a bug that occasionally prevented the Seal of Command talent from casting.
-Thick Obsidian Breastplate: The effect from this item will now properly trigger from the Warlock "Death Coil" spell.
http://wowwiki.wikia.com/wiki/Patch_1.10.2
-Eye for an Eye will now properly produce its damage effect on the attacking caster.
http://wowwiki.wikia.com/wiki/Patch_1.11.0
-Spell and Item Auras with Charges: These auras will now correctly remember their number of charges when you enter or leave an instance, change continents, or log out.
-Beneficial spells and abilities that target multiple units will no longer consume resources (i.e. mana, rage etc...) if they fail to affect anyone.
-Blessing of Light: It is no longer possible for a target to appear to have multiple ranks of Blessing of Light. These multiple auras had no beneficial effect, merely causing confusion. Problems with targeting the spell when the caster has Blessing of Light effect on them have also been fixed.
-Judgement of Command: Now consumes a charge of the Zandalarian Hero Charm. In addition, when this spell is resisted it will no longer erroneously still do damage.
-Judgement of Righteousness: Now consumes a charge of the Zandalarian Hero Charm.
-Vengeance: Seal of Command critical hits can now trigger this ability.
-Vindication: This effect will no longer be absorbed by Grounding Totem.
-Zandalarian Hero Charm: The damage and healing on this item have been reduced by 30%. Instead of granting 35 damage and 70 healing per charge, it now grants 25 damage and 50 healing per charge. Several Paladin spells, Starshards, and Lightning Shield were not consuming charges of this trinket. All those spells have been fixed. In addition, totems which now benefit from increased damage and healing will also consume charges (Healing Stream Totem, Searing Totem, Magma Totem, and Fire Nova Totem)
-The axesmith weapon Nightfall effect has been changed from -60 resistance to +15% spell damage taken. Also its speed has been decreased somewhat.
-The Gift of Arthas now uses the elixir cooldown rather than the potion cooldown
-Players in a party may now select an option that allows them to reset all currently open instances.
-You only get the reset all instances option if you are a party leader.
-If you select reset all instances, all non-raid instances will be reset to their starting condition.
-Area-of-effect spells will no longer occasionally damage creatures with which you are not at war.
http://wowwiki.wikia.com/wiki/Patch_1.11.2
-Seal of Righteousness will now benefit properly from wizard oil and other effects which give bonus damage against specific creature types.
-Fixed a bug where sometimes casting a spell immediately after a swing would prevent Seal of Command from triggering.
http://wowwiki.wikia.com/wiki/Patch_1.12.0
-Cross-Realm Battlegrounds Edit
For the first time in the history of World of Warcraft, you will be able to face off against players from other realms in the Battlegrounds. PvP Battlegrounds link Alterac Valley, Warsong Gulch, and Arathi Basin so that players from several realms will be combined into one huge matchmaking pool. Replenish your mana, sharpen your blades, and get ready for some brand-new challengers!
-Threat Reduction Effects
This system has been redesigned to eliminate inconsistency in how the effects work. Previously, some were additive (for example: 30% reduction + 20% reduction = 50% reduction) while others were multiplicative (30% reduction and 20% reduction made 44% reduction, from 0.7*0.8). They are now all multiplicative. This also prevents unpredictable behavior when the total reduction percentage was equal to or greater than 100%. Please note that in almost all cases, when stacking multiple threat reduction effects you will experience less threat reduction than previously.
-+30 Spell Damage Enchantment: Fixed a bug with this enchantment which was preventing it from benefiting healing spells.
-Blazefury Medallion: The triggered effect from this item will no longer break Gouge.
http://wowwiki.wikia.com/wiki/Patch_2.1.0
-Improved Seal of Righteousness: The percentage increase in damage from this talent is now applied after all bonuses from items and effects which increase your spell damage. (which mean it should never be increased by spell damage until tbc making this "much useless talent that i never use" and gives us barely 5-10 damage or max 19 tps per sor swing.
-Seal of Righteousness: This seal will no longer cause additional chances for weapon procs to trigger. (which mean until tbc it gave us additional chances for weapon procs).
http://wowwiki.wikia.com/wiki/Patch_2.1.2
-Procs: Most procs are set to trigger only from spells that cost mana, but inadvertently disallowed spells that cost a percentage of base mana. That bug has been fixed and so such spells will now trigger many procs they did not previously trigger. (this explains that many procs were meant to proc from "mana abilities" until tbc and within tbc, example procs such as weapon procs,trinkets etc).
http://wowwiki.wikia.com/wiki/Patch_2.2.0
-Redoubt: This ability can now trigger while the Paladin is sitting.
-Reckoning: This ability can now trigger while the Paladin is sitting.
-Blazefury Medallion: This item will no longer trigger against targets affected by Sap.
http://wowwiki.wikia.com/wiki/Patch_2.4.0
-Judgement of the Crusader: It is no longer possible to have icons for two different ranks of Judgment of the Crusader appear at the same time when judged by multiple Paladins. (this mean that this is not bug , neither abuse and we should be able without "risk ban" to use this, it works as intended in Nostalrius but they not allowing us which is wrong what they do and is TBC, i demand this suggestion to have an open debate with this evidence at patch 2.4.0)
http://wowwiki.wikia.com/wiki/Patch_2.4.2
-Ravager Judgements will no longer auto-refresh and break the effect from this item while its effect is active.(which mean judge of crusade/wisd/light should refresh but break the effect until tbc )
http://wowwiki.wikia.com/wiki/Patch_3.0.2
-Attack Power and Spell Power scaling on all Seals and Judgements other than Command and Blood has been reduced. (this is just evidence that seals "righteousness" was scaling until wotlk).
-Consecration now scales with attack power and spell power. (sadly the only evidence)