stage.mouseX  stop works after you click outside of canvas

Hi,
0.7.1 -- dont haму this bug
0.8.0 & 0.8.1 - has this bug.

if you click outside of canvas few times and after click on canvas and try  output stage.mouseX  its will shows you "old" values. and never will show correct new values. its just freeze with old ones.

i found solution for this bug:  instead of using stage.mouseX   we can use mouse event.stageX
