I have some problems with navigation in MediaPortal. I experience them mostly when using the TVservice. On my remote is a button for tv-program and I click it very often to switch channels. When I want to return to the homescreen I need to push the back button several times(it goes back to EPG-fullscreen-EPG-etc). So it seems that MP opens a new TV-program-"window" whenever I click on it. Wouldn't it be more logical to "jump" back to the one which is open already when I press the EPG-Button?