If you use the green button on your remote to launch MediaPortal (by configuring the use of MPTray) then MediaPortal does not always have focus upon launching. Sometimes the windows task bar is still visible.

When this happens, you can press the green button again to give MediaPortal focus, but this then switches to the basichome screen, which is not ideal.

Proposed solutions are to either give MP focus whenever it finishes launching in fullscreen mode, or to add a /mptray 'switch' so that MP knows it has been launched using MPTray and then takes focus.