Yes, and now I even removed the connection shortcut to the wiimote, if it was somehow causing trouble.

And, it was. Just stopping "My Bluetooth Places" fixed the problem. Hmm.

Okay, Bluetooth connection is still going but turning off the connection to my wiimote fixed the problem...

Also, I think it was because some time ago I ran a script using GlovePIE which let the wiimote simulate steering and acceleration and braking and all that, by turning movement into buttonpresses, and I played Flatout 2 using that when the game suddenly crashed, while turning left and accelerating which would mean pressing left and up...

Strangely, this is only affecting me in games. Doesn't happen anywhere else.