Not sure if it's a bug, but i've noticed a problem with my game which has only happened since I installed 2.56 beta 4.
In my game when I click my inventory button or press tab, the game crashes and says:
"Error: Display: Single word longer than window width"
This has never happened before, and now I can't seem to open the inventory, I havn't touched any of my GUI's in about 2 months, and worked fine the other day. All I have done since i last recorded it working is adding some dialog to a conversation :P
This is due to the changed algorithm the GUI labels use to draw the text, but I have reverted this behaviour to RC1, so upgrade to solve the problem.