Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, I joined Nostalrius several days ago and since the beggining I had this unit frame bug



I tried deleting WDB file, tried redownloading/reinstalling the game itself from http://forum.nostalrius.org/viewtopic.php?f=32&t=2803#p25865
Also I didn't have any addons at that time and now it's the same.
Luna Unit Frames don't have a bug like this, but I don't really like the addon.

Does anyone know how this could be fixed or know any other unit frame addons I could try out?

Try to change game video settings, resolution, windowed/maximized mode. Also try running game in opengl mode - create shortcut of WoW.exe and change it's command line by appending opengl parameter at the end, like this:
.......\WoW.exe -opengl

Also try updating / changing version of your graphics card drivers.