So I accept the fact that my carelessness led to this result. That said, the UI should never have let me get in this situation.
A. It is a very common scenario for players to identify large numbers of rares in one sitting. Aside from the new paragon ranks, that is the endgame.
B. There is no way to identify those items outside of right clicking. Accidentally right click twice on the same item though....and you just switched the piece of gear you identified with what you had equipped.
How does this happen?
You identify something, confirm its crap, then try to identify the thing next to it, but wing it and accidentally hit the thing you just identified and confirmed was sell bait. You right click again on the next unid piece and continue on your merry way. Then you go sell (carelessly counting on the fact it was all crap when you identified it so you don't review it again_ and BAM just sold a piece of your equipped gear).
The right click to equip/swap items from inventory to equipped is a horribly dangerous UI element. It should be altered by one of the following:
1. Exclusively requiring drag and drop to equip items. Since you very rarely equip something new (especially compared to identifying things) this wouldnt really be burdensome.
2. If there must be a key combo, force the user to shift right click to alter equipped slots. Then its different then the identical mouse stroke used to identify something (save for the item context, id vs. unid)
3. Alter how items are identified from right clicking on them to some other keystroke or combo keystroke
Could also flag items purchased through the RMAH and prompt a warning before selling to a merchant.
I love d3, have been enjoying it since launch, was a long time d1, d2 (even spiritual cousins HGL and HGG) fan and player. I think you have created a great game Blizzard and 1.04 is a great improvement, but honestly after traveling the last week and not being able to do more than AH surf over hotel wifi. I was really looking forward to playing a bunch this weekend and raising paragon ranks, now.... I feel gut shotted and dont really want to play at all.
The UI can be improved to prevent this situation from happening. It should be.