changing values on MR editor knobs with mouse freezes it

i think it began after updating to 1.7.5 MR tools.
whenever i try to modify a pan or any other cycle knob on MR editor with click on it and drag, mr editor and mouse pointer freezes… actually mouse pointer disappears,and computer is looks like as not responsive…
if i use windows logo key+tab in win7 to rotate between programs the mouse pointer comes back and i can use the computer again…but it occurs every time i try to modify the cycle knobs om mr editor !
this behaviour not occurs if i use the mouse scroll wheel.

any ideas how to fix this ?

Same here. Mostly happens when I just opened the MR mixer and adjust something right away.

Same problem here !