yes, it may be. If you can, try using a wired mouse, and change the channel on your
Airport, and the frequency, maybe check for interference robustness. I have found that BluTooth on the Mac pro is not so good, so I went out and bought a usb plugin for BT, which sits at the front of my tower and helps with that. Also, see if moving your Airport and modem further away helps things. Oh, and try running disk Utilities, repair permissions and check for updates (it's worth a try). If you are using an aluminum keyboard, I think there was an update released just for that alone.....
see also if there is an update for your mouse's software, or what the buttons are set to open by default
hopefully this helps
Thanks, those are some great suggestions. Actually, I think I may have figured out the problem. By using the "Keyboard Viewer" in OSX, I was able to determine that my Command Key was sometimes sticking. Well, it wasn't *really* sticking but my Mac would think I was pressing it and not letting go for some reason. That was causing a lot of the weird behavior, including some of the erratic mouse issues. My keyboard was running through a very old USB hub, and so was my webcam which I also discovered was curiously not working. I bought a new USB hub and so far the problems seem to be gone. It's very odd that the Hub went bad at precisely the same time I moved the airport into my office, but maybe in all my unhooking and re-hooking of wires I shorted it somehow?
If you ever need to use the Startup "snag-keys" for alternate booting, you will need your keyboard directly wired into a USB on the chassis, not on any Hub, not even the one in a display.
Apple supplies a short USB extension cord to help, but it may not be long enough, and it is keyed so that you cannot use more than one. You can buy a USB extension cord, but remember the limit is 15 feet, including the wiring inside the computer and inside the keyboard itself.