MS Windows 7 Home Premium 64-bit SP1
NVIDIA GeForce GT 555M
Broken: 2.71 Release Candidate 2 a19c1be
Although it's been broken since at least 2.67.1 r57348
Short description of error
When motion actuator is set to local and add the the object moves when rotated on Z axis in weird ways (kind of hard to explain.)
Exact steps for others to reproduce the error
Start game engine
Use WASD to move and Q and E to rotate.
Once you rotate over 0° the direction you move is off. If you rotate around 180° your movement becomes very jerky.