I had the exact same problem, it's in the DM. You need to remove DM completely and reinstall either from the website or the disk, not you're os on you're computer but DM, dont reinstall it over uninstall it and reload it. That will fix it, selective backing up of sections works but not a fix.
Awesome Gatewayad, Finally...:D
Pain Producer, how is that DM 5.0 working for you, since this issue I went to 4.7 and not liking it as much as i did 4.6, was thinking about going back to 4.6, do you see any advantage with 5.0?
Finally...loading DM 4.7 instead of 5. I will let you guys know. Cross my fingers