whats wrong with it?

is there a bug in 1.1.4 because before i updated, my ipod was fine and it would crash every now and then but nothing extreme. now after i updated to 1.1.4 it crashes at least 5 times a day, sometimes more. (by crash i mean it freezes up and returns to the home screen.) is it a bug in 1.1.4 or my ipod. i've jailbroken my ipod a few times before, the first few times w/ jailbreakme.org and the last time w/ ziphone. idk if that has anything to do w/ it but it might. should i just restore my ipod to factory settings?