So, I had an issue with my very first XV6800 I got back on the first shipment when the phone was released. The "O" key quit working properly so Verizon FedEx'ed me a replacement. So, after transferring all my crap, I got to looking and I noticed something about the MMS capabilities. I don't remember what my old phone's version of ArcSoft MMS Composer was, but I think they finally caught on and updated it on this particular phone. My original phone had a ton of issues with sending/receiving MMS texts, which I was able to fix with some registry edits. One thing I noticed was that in my MMS inbox, there never used to be an icon next to the subject line and sender. Now, my new phone has an icon in the inbox. Not sure what it all means, just take a look at these pics and see if it differs from your version and the way yours looks.
So far it's been working flawlessly, but who knows how long that will last.
-Randy