think it was a playon issue as after the last playon version upgrade the issue has not reared its ugly head again (fingers crossed).
one thing I noticed about medebo is it flashes up slower, so be patient for the return screen. also it may flash up to pal mode in which case you hit the "tv system" button on the remote to cycle back out of pal.
as I found here -
http://www.patriotmemory.com/forums/...=2871&page=161
posts 1601 and 1602
beats the heck out of trying to navigate a rolling pal screen,

enjoy. I like the newest medebo best personally.