I have been having problems with the SMS application in iPhone, it displayed 1 message but whenever i try to view my inbox it simply crashes and springboard gets displayed. After much googling, I found the answer here.
I found the problem is with ZYB... yup. the same cool service I blogged a while ago, which can get all the phone numbers from your cellphone stored in a central repository. Apparently a message they send has few alphanumeric characters which iphone can't open ;) cool hack.. So the simple solution is to use iBrickr to delete the /var/root/Library/SMS/sms.db file. Caution : This will delete all your messages that are stored in your inbox. You can also take the approach of installing SQLite and browsing thru the records and then deleting the malicious sms alone.