Clicking with the Bezier Curve Tool shows no change at all on screen, right clicking does not open the pop up menu. The Freehand Curve Tool allows the right click menu to appear, but also does nothing when left clicked.
Both mouse and tablet (Intous 4 Medium) input are not registering. Disconnecting and reconnecting either changes nothing. The tablet input is possible more reliably, but most of my input is unresponsive.
*** This bug has been marked as a duplicate of bug 382125 ***