lr3.3 weird glitch on pc \ mouse click

been experiencing this for a while... cant remember when it started

on a PC, while working in LR, suddenly my mouse right click stops working. i cant get the context menus up. i exit LR and open it up again and it works again..

any ideas\? am i alone on this?

edit:
actually come to think of it, this was only a lr3 problem. i dont recall it happening in lr2

I've had it happen a couple of times, and have yet to figure out why.
It only seems to happen when I'm working quickly, rapidly sorting images etc.

It only seems to happen when i have the grid view open in a second monitor though, I wonder if the context menu is opening behind the grid view?

interesting.. i always have my second monitor in grid view too
the next tiem this happens i think i'll enable/disable the second monitor and see if it resolves.