Not sure when it exactly started but it's been happening for a good year now.. When I try to click the X to close a tab, window, or anything, 45% of the time I'm trying to click it, it just doesn't work. I can see that my mouse is hovered over the X, it's showing me the hover state and I can sit there and click all day and it won't close. Sometimes even if I move the mouse away and try to do it again it won't work so there are times I have to do this 3 times to get the bloody thing to close.. Anyone know why it's doing this?