I'm running R5E50 installed from scratch. I didn't have any problems until I tried upgrading the nVidia drivers to try and fix the high cpu when OSD comes up. After installing I cannot get any sort of signal lock or signal strength on any of my HDTV channels. To fix this I

1. stop the back end
2. bring up setup
3. bring up channel editor and rescan
4. delete all the annoying weather channels
5. start back end
6. start front end again
7. works great

Don't know why they aren't getting saved. Anybody else?