I think my wireless mighty mouse which i bought about 5months ago is broken. Its not a major issue but it is something i highly enjoy and hope i can get it fixed. The scroll ball wont scroll down. It works in every other direction but it was a wierd all of the sudden type thing. It was working and then i went to take a shower and when i returned it didn't. I turned it off and back on again but that didn't help. Any other suggestions. I have the extended warranty on my mac pro which i bought at the same time as the mouse/keyboard will this be covered? please help!!