1) Durance constantly has a bunch of status effect icons that show 10, etc raw damage in addition to his rest bonus.
He's not actually taking damage; they are just benefit icons, which when moused over, show the above.

2) Cape of the Master Mystic grants invis when critically hit.
Somehow, it became permanent at one point and was only fixed by exiting game completely, then starting up again.
During that time my char could not be targeted by any spells, even his own healing spells.
Oh and the animations were frozen only on him; maybe an animation bug?

3) During the text sequences at the end of WM2 final scenes inside the crystal cave, the menus freeze for a good 10 to 30 seconds.

Edit 4) Sleeping at campfire clears the inn/owned bed bonsues, which really sucks.