I jailbroke my GFs 8GB Late 2009 iTouch when green poison was released to work with iOS 4.1, everything so far has gone smooth but all of a sudden, only when opening certain apps (the app store being one of them) she is being presented with the "white logo on black background" for a minute or two before it sends her back to the springboard..

I've tried restarting, rebooting and freeing memory using SB Settings but no luck so far.
Any ideas?

Sorry if this is the wrong section, seemed the most relevant