The latest version of MPlayer works grest! But when I try GMplayer and go fullscreen the menu won't go away, which naturally is quite annoying. Ordinary MPlayer doesn't have this problem.

Is there something I can do to correct this or is it a bug?

There's been no change at all in that regard, so it didn't appear with this version. Menu is not supposed to be shown, but it's not explicitely told to be hidden. So my guess is you deliberately decided to show menu in MUI settings (menu), in which case you might want to disable that.

Thanks. I'll look into that.

Yep. That was the problem. Thanks

Thanks Fab for your continued work! I use MOS more frequently as I only check some websites/see some videos/run emulators.

@Yasu

fyi - middle mouse button also toggles the menu display in fullscreen mode.

I tried that, but it sent me to the desktop screen instead. Is it a MUI setting?

You probably have middle mouse button bound to screen cycle (or back to Ambient) event. I don't remember it's set by default, so you either set it or you use predefined settings like Chrysalis pack or so?

Anyway, the behaviour can be changed in system preferences -> icontrol.