yep lots of bugs in 3.1, My Fav is: Spell & Ability Issues
Talents - Talent points are sometimes being refunded when zoning or using dual talent specs.
Ive had my druids talents wipe 4 times now along with the actionbars /sigh
For a complete listing of known issues you can visit:
http://forums.worldofwarcraft.com/th...18872807&sid=1