Heads up, EVO Shift 4G owners. A small update that will bump you up to v2.76.651.5 should be arriving on Monday, Aug. 8. Once updated, anyone experiencing intermittent MMS/SMS sending issues will no longer be seeing error messages and MMS/SMS messages will go through as expected. Let us know when you get the update -- it should pop up as a notification on your device.
Update: We just heard from AC reader Zachary that he has this update available now. Go into "HTC Software Update" in your settings menu, and have a look. Pic after the break. Thanks Zachary!