I've just merged a few bugfixes from Sergof's branch. The highlights follow:
- WARNING: old files may not work totally correctly as a number of settings were renamed. Namely deactivation/damping thresholds and bounciness.
- Fixes for ranges of various properties
- Stability fixes for removing rigid body worlds (namely ensuring that objects are removed from said dynamic worlds).
I just noticed these interesting stats on an earlier update post about this... ;)