I'll give you a link to a few ROM's i hope you love, this is Truxt
http://forum.ppcgeeks.com/showthread.php?t=76053
and then there is MightyROM 4 and 3.9 which truly are awesome!
http://forum.ppcgeeks.com/showthread.php?t=38999
as to your issue, try hard resetting your device but back up your things first and take note of which software you install for it happens again you can let us know.