Well, I've had a problem with pretty much every wireless item I've purchased in the past three weeks. First I bought the Logitech S 530 wireless Keyboard/Mouse set. I thought it was an OK set, but then the mouse began to jump around erratically from time to time. I thought that it must be defective, so I took it to the store and tried it there, and it was fine. I figured, why risk it though, so I replaced it with another set. Needless to say, the new set did the exact same thing. I tried it on my windows machine, and it did the same thing as well. This is not some small glitch btw, the mouse will literally wander off in a random direction for more than a second sometimes. So I returned the S 530 combo again, thinking it was a bum design and replaced it with the Apple Bluetooth wireless keyboard and the Logitech MX Revolution. This is pretty much the best Keyboard/Mouse set imaginable. The only problem is that BOTH of these are experiencing problems. The mouse is doing the exact same thing that the previous two mice were doing, and the keyboard will sometimes stick on a letter for a second or so. The keyboard thing drives me crazy. For instance, I'll be typing "drives me crazy," I'll look up at the screen and I'll see "driiiiiiiiiivvvvvvvvvvveeeeessss mmmmmmmeeeeee cccccccccccccccccccccccccccccccrrrrrazyyyyyyyyyyyy." Has anyone heard of a problem like this before? I have an older wireless keyboard/mouse set and it works fine. I'm thinking that these newer items are using 2.4ghz signals that are catching some troubles in the air somehow. I thought maybe it was my wireless router, but I turned it off to no avail. Any of you guys have any ideas? Or has anyone ever heard of anything like this happening before?