I have a macbook I bought this past August. I made the switch from the PC and will never look back ;-)

Something strange that is happening lately is I will be reading my mac mail messages and when I click to reply on one it will open up a new reply window (like normal) but then it will immediately open up another right behind it exactly the same. It does this about 1 out of every 8 times I reply. I just close the redundant one but this is obviously not normal. Also, sometimes I will open a new window or finder or something and it will immediately disappear behind the other open window.

I do use spaces and expose.

Any ideas or solutions?