TimeLiner: Mousepointer vanishes

when middle-clicking on a keyframe in the TimeLiner window, the mouse pointer disappears and can no longer be seen in any of VVVVs windows.

middle-clicking a keyframe is supposed to hide the cursor and constrain its movement to horizontal (timewise). after releasing the click the mousepointer is showing up again. just tested here, works for me. hmm…

it appears that this only happens on a specific production machine, can’t reproduce it on my lappy either; sorry for the fuzz.