I got this problem since last update (30 Jan 2013) I can log in and play about 2-3 minutes and my minecraft stopped. :< Anyone in here got the same problem? or anyone in here know how to solve this? PS. I did change the Java memory and it still occur. Spec: Intel Core2 Duo CPU E8400 3.00 GHz 64 bit Operating System 4 GB Rams Nvdia VGA Card Geforce 9600 GT
4GB of RAM should be enough! So, did you install java 64-bits ? Did you go to the launcher options and defined the amount of memory yourself ? (min: 2048; max: 4096)
Initial Memory: 2048 Maximum Memory: 4096 If that doesn't work, change the Maximum Memory into something lower. Never change Initial Memory, it doesn't cause the crash.