I think I might need to do the factory reset. Since the update, I have lag in some things, and in other things the phone is being extremely sensitive, so I thought I'd try it and see how it goes (no harm in giving it a shot). Before I do, however, I wanted to check and see if anyone knows whether or not my corporate exchange information (work e-mail, calendar) will also be wiped out and then have to be re-added. It seems like it might not be worth the trouble to go through with the factory reset if that's the case. I know that the apps come back on their own (though I'm not sure if that is due to them having to be re-downloaded from the marketplace or whether they just appear, since I haven't actually done it), but I'm less concerned about them than my corporate email/calendar. Any ideas?