Mouse double clicking
I had a mouse double clicking problem with my logitech mouse. Every time I click once it clicks twice. This happens with both the left and right click. I bought a new mouse and within days, it had the same problem. I bought a third mouse and once again, in days it had a double clicking problem. It seems pretty obvious that there's something wrong with my computer.
I have a Macbookpro 2012 running Mountain Lion.