Launcher/pack Version:5.4.9
Operating System: 32 bit
Version of Java: 1.6.0_31
Description of Problem: Sometimes when i press R or U to find out the recipe (btw have have it on global options and recipe mode) it crashes and it says saving chunks and loads a white screen
Error Messages: N/A
Link to pastebin of log: http://pastebin.com/s8cvsfLC