I've had my bluetooth keyboard fooooor probbbbbbably (there it goes) a year now and I've always had this issue where the keyboard will repeat letters excessively, even when I'm not pressing down the key (as above).
I'm also using a Logitech MX900 (bluetooth mouse) and am not using the provided bluetooth dongle, but pairing up to my 15" G4 Powerbook directly. I am also browsing the internet via WiFi.
Has anyone else encountered this issue? Is there a fix? It's pretty annoying. Not sure why I didn't take it into the Apple store before, but I thought I would ask here.
(BTW, this post has been edited. I keep getting the repeated key strokes annnd it's very annoying to go back and delete the extra lettersss.)