Hi I'm just wondering what the answer was that they gave you to fix this as I'm having the exact same problem with mine?
Basically when I'm using Final Cut Pro 6 and I hit F9 or F10 keyboard shortcuts for insert and overwrite all that comes up onscreen is a horizontal line with a few really small lines over it, almost like a little sunrise (a la the picture on the actual F9 and F10 keys, and a small "not allowed" symbol underneath it, similar to the "no smoking" signs except without the cigarette obviously!)
Then when I went into system preferences, went to keyboard, and ticked the "use all F1, F2 etc keys as standard function keys" box all that happened when i tried them was that it did stuff with the windows, separated them and what not??!!
Any help would be very welcome!