Hello Mojang,

My son found this bug :
In options ... Controls ... you could put "ESCAPE" key everywhere. Example if you put on "Pick Block"

When playing solo and you closing a chest, one in two chance that the game crashes.

For fix it, blocked the Escape key.

See you in Paris for MINECON 2012 !

Bye

Edit :
Step 1 : put "ESCAPE" for "Pick Block"

Step 2 : open a chest

Step 3 : move the mouse over an item in his inventory

Step 4 : do ESCAPE