Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)
Post the crash logs. Or look at them; they might show some insight as to why it's crashing. Or rum the 10.6.8 combo updater again and see if it installed a missing file.