I've just noticed something. After giving up on flyinside I flew a few routes in normal flat screen XP11. And I've noticed that I can't quit, it freezes the whole computer, and I have to hard-reset. Then I also noticed, that after flying around for about 20 minutes, I can't alt-tab anymore, and the reason why I can't quit XP is actually that outside XP I get
black screens everywhere. So alt-tabbing to any other app or even to desktop just produces a black screen, while XP works fine (I can alt-tab back into it, that's the only app not producing a black screen at the time). And when I quit, XP actually does quit fine, but all I have is black screen, so I have to hard reset, even ctrl-alt-del doesn't change it. The only way to quit normally is to switch XP to windowed mode and only exit afterwards, that gives me back my screens.
Anyone else able to observe this? Flyinside is still installed on my computer, and is active according to the plugin manager, so there still might be a connection, I'll check it later, but I found this too interesting not to post before I do.