I installed the latest version of theatre last night. i just ran the installer from the Emby website, never uninstalled the old version. This morning I started it playing live TV, and after a while, went to use the mouse to stop it, but the mouse was gone! There was no cursor on the screen, and clicking or right clicking anywhere did nothing. I had to hit esc to get out of live TV. I think I saw another report of this the other day, but didnt spend much time looking for it (I'm at work).
Just thought I'd send in a report.
tonight I'll try uninstalling it, and then reinstalling.