What you need to confirm is whether or not the mms setting on the device have changed or were wiped out. Usually CS or public websites have your mms browser settings on them. If you have AT&T then go to their website and check out your device's settings. Easiest link is
Long link....obviously but more than likely something wasn't filled out correctly when your ROM updated. This is by means no fault of your own, but sometimes updates can get dicey