Mac os X 64-bit , NVIDIA GeForce 320M 256 MB
Broken: Blender 2.69.11/ which is the 2.70 test build.
Short description of error
Well there is something wrong with the rigid body simulator. When I add a object and make it active and add a plane which is passive. The object does drop to the plane as it should but once the active object touches the passive plane it starts to slide and move around. Physics are not properly simulated.
Exact steps for others to reproduce the error
I uploaded a video of a screen recording to show the problem/bug on my youtube page.