Hi everyone, My MBP suddenly came down with a trio of weird glitchy problems. First, I generally have dock hiding turned on - and am now unable to get the dock to pop up by moving the mouse to the bottom of the screen (it works fine when I turn hiding off and use it this way). Second, my active corners are EXTREMELY sluggish (like, they respond to the presence of the mouse in 5 - 10 seconds, if at all). Third, typically when you move the mouse arrow over an option in the menu bar (eg., File -> New Window), the option is highlighted with a blue bar - this doesn't happen for me anymore. I can see the arrow, but nothing actually highlights. It almost seems like the computer can't read the position of the mouse, or that it doesn't "know" where it is and can't respond to it. I am, however, able to click, open applications, scroll, etc., all the other normal mouse stuff. Has anyone ever experienced something like this? Or have any suggestions?