Similar issue. Updated and jailbroke with redsnOw last week, officially unlocked 3G phone. Cydia worked at the time, but contantly crashes now (it is DH phone so not sure what he did in the mean time). I ran redsnOw again, but no luck. It still crashes on opening Cydia. He needs cydia (don't we all?) Should I reinstall 3.0 ispw with itunes to correct, or is there something else?