The bug just happened to me 3 times in the last hour as I was setting up the physics for a new vehicle in RenAlert.
My current hardware:
Athlon 1.6 Ghz
256MB RAM (64 shared as video ram)
on board video chip (not sure what it is)
40GB hardrive with 16GB free
The bug also occurred on my older computer. It's hardware:
Duron 850 Mhz
128MB RAM (16 shared as video ram)
on board video chip (not sure what it was)
40GB hardrive with 12GB free