Stop me if you've heard this: Vegas 11 (64bit, any Build) when I use my Contour ShuttlePro to scrub through a timeline and turn it past the "Shuttle in Right 3" setting (the third speed step), when I let the knob go back to its rest position the playhead refuses to stop, it keeps on going. It also seems that the focus in Vegas jumps to the Pan/Crop window. If I close the Pan/Crop window, the ShuttlePro works as advertised.

And since I brought it up, see if you can repro this: open the Pan/Crop window and set a keyframe in the Position track. Now Undo the keyframe. If you see what I see, the clip that's loaded into the Pan/Crop window changes to a different clip. I don't perceive a pattern, but it's often a clip that I've worked on previously.