The cat can cause that bumping noise when it chooses to press a key down while sitting on or close to the keyboard
it had better not be next door's cat getting in through the loft window - I have enough problem with it crapping in my flower beds
The wireless keyboard is certainly playing up as the t key has managed to get stuck on now even though the key isn't depressed - so I have taken the batteries out and resorting to the old fashioned way of a wired keyboard for now. A trip to the Apple store on Monday I think unless it cures itself overnight.
Zen Fibre Active. Router Thomson TG789VN.
Windows 7 Pro 64bit and iMac 9.1 and MacBook both running Snow Leopard