[sdlucky7]

I have an idea...

I had the same problem with mine a couple of days ago. I found that no amount of restarting/soft-resetting could help the problem. I removed my storage card, and the messaging app worked fine so I figured it must be something on te storage card. What solved it for me was that I deleted the "Inbox.mst..." folder from my storage card. I get a lot of large attachments in my E-mail and have set all attachments to be saved to the card. When I deleted this folder, the messaging app started right up, and the E-mail program created a new "Inbox.mst..." folder on the card. It has been working fine ever since (about a week).