Comment 3 for bug 348934

using:

ubuntu 9.04 amd64 (clean install)
mythtv-frontend 0.21.0+fixes19961
nvidia-glx 180.44

This issue was present in Hardy, corrected in Intrepid and resurfaced in Jaunty. It appears to be Gnome specific, as I cannot duplicate the issue in kde.

Workaround:

sudo aptitude install compizconfig-settings-manager

System->Preferences->CompizConfig Settings Manager -- enable legacy fullscreen support in the workarounds section.

This is only a partially effective workaround, and will result in video artifacts if you are working in another window (scroll in another window for an example)