I have been popping in to the forums for month to see if this has been fixed, I see its still ongoing. I have been having this problem since the 1st patch after the launch. Blizzard are aware but in all the patches they have not updated their response from.
We are aware, We are working on it, Send me your erro/bug report sheet.
Thats as far as its got, Ive put in around 700 hours into this game and mainly because of this issue I have not equipped my characters barely out of beg.intermediate level equip.
The Uninstall key is looking highly attractive right about now.