Captivate Text Message Problem

Hi all, 

I am having a problem with my Captivate that only happens occassionally with incoming text messages. Instead of a text message, I get what looks like a MMS message notification, but it just says (for example):

Message size: 1 KB            Downloading

Expires: 2:48PM, Jan 19

"Downloading" is in gray, and nothing ever changes.  This has happened with text messages from 4 different people, all of whom assured me they weren't sending pictures or anything, just texts.  I have received normal texts from them before and after these broken texts.

This happened in December several times in a single week, so I called AT&T's support.  They sent me two sample pictures, which worked fine, and then made me factory reset my phone.  The woman who told me to do the factory reset (without warning me that's what we were doing), then rudely informed me that if the problem continued, it was my friends' problem, not AT&T's, because "everything's fine over here."  Since it is now happening again and my friends tell me I'm the only one, I'm guessing that's not the case. 

Anyone else have this problem? Anyone know a solution?  I'm about ready to chuck this piece of crap in the Potomac.

Thanks,

Monica