**System Information**
Operating system and graphics card
windows 7 with a NVidia titan black
**Blender Version**
Blender 2.72 hash: d7e4944
**Short description of error**
If you switching the interaction preset at the splash screen to maya, than the Knife tool in the Tool tabs is working like you would push the LMB permanently (the new feature).
**Exact steps for others to reproduce the error**
Is not possible with a blender file, but if you switch the preset to maya and try out the knife tool. You will realize immediately the problem.