It's happened to me, too. But I'm wondering if it's just because I didn't turn off the keyboard before stowing it away [Blue colours 'FN'+'Backspace'] so the N800 was basically confused and still waiting for the iGo's bluetooth signal when I wanted to use the stylus... .

I'd hate to think I'm my own bug. I've been called 'batty' before, though, so I guess it's possible :-)