Mouse single-click equals double-click
For a few days now, when I click my mouse on something, it sometimes registers as two clicks. It doesn't happen all the time, but frequently enough to be annoying.
For example, when I click a YouTube video to pause it, it often opens into fullscreen (which you normally click twice to do). Also, in the URL bar of Chromium, I can't select the entire URL by clicking. I now need to use Ctrl+A. That's also because when I try to select the URL, the highlight randomly disappears.
If I have multiple windows open, my click on the first "x" of the top-most window also closes the next window.
I'm on Linux Mint 10.
Any ideas? It's not really important, but it drives me crazy sometimes when my mouse doesn't work the way I want it to.