PSP problem - can't exit games

[wem003]

I've searched everywhere, called Sony and they are sending a box for me to ship it back for service (thankfully I have a month left on the warranty)....

But has this happened to anyone?

Any time I am playing a game, if I hit the Home button - once the screen pops up asking if you want to quit the game, the only button that works is O - letting me get back to the game.

I've reset default settings, nothing. followed Sony's advice and removed the battery for 10 minutes and then reset default settings, nothing...

It's on firmware 5.0 now, (PlayStation store on this is great!) - never been hacked, rarely played, and all the buttons work everywhere else...

I'm sending it in as I mentioned - just wondering if anyone had this happen and a fix to try while I wait for the shipping box from Sony.