I found this video. Posted Nov 27 2006. I realize that date is AFTER the current patch we are on; however, given that this mage takes 100+ hits with Ice barrier on and doesn't get dazed once AND we can't find any language in patch notes leading up to this date (go to wowwiki and read all of the patches) then it must be that it was originally coded into the game to NOT daze with an absorb shield up. (Also wowiki has language that tells you you can't be dazed with power word shield up, a spell that functions the exact same as ice barrier.)
I would also like to point out that nothing in this video leashes as quickly as the nost server, another thing that can be fixed.
*edit, it seems that the rogue poison fix happened because there were a number of posts regarding them breaking it. Since there aren't a number of posts going up about this. I will make a new post every day about this until it gets fixed.
https://www.youtube.com/watch?v=M8E6-mZrU4I