3.0 UPGRADE iPhone Mail Program crashing

OK... seems OK when I make my exchange Email account inactive, the others work fine. So it is exchange emails. Sadly, of course, thats the most important to me.
Any thoughts anyone?

Im having the same exact issue...My Gmail is OK, when I can get to it, but my Exchange hasnt fully updated since this afternoon, when I went through this upgrade.
Anyone?
iphone iPhone OS 3.0

Try deleting the account and recreating it? See if that helps? Thats the only thing I can think of.
MacBook Pro Mac OS X (10.5.4)

I had the same problem on my iPhone and mail crashed every time the application opened. Fix for me was to go into Settings. I then found a second account that was blank, so deleted it. Worked a treat on imap with instant downloading of email from the usual email account that was synced with my macbook.
Cj.
 iMac, 20", 2.16GHz  macBook, 1.8GHz (white) Mac OS X (10.4.7)  iPod Photo 30Gb  iPod Hifi

Sorry, I saw this posting after I created one of my own about the same problem.
I too have one exchange account (out of four), which I just turned off. That has stopped the Mail app from crashing.
Like other posters here, my company exchange account is rather important. So a bug fix immediately Apple please?
Unless anyone has a fix for this problem?
PowerMac G5 Quad + 2.8Hhz C2D MacBookPro + Intel iMac 2.8Ghz + iMac G5 20" iPhone OS 3.0