I'd start with the company where you bought the keyboard.
I just purchased a 15" MacBookPro (July 2010)
I am not used to laptop keyboards so I was able to purchase a bluetooth Apple Keyboard with the Numeric keys.
This bluetooth external keyboard was made by Apple and a local company had these brand new for $60. I was told they were the model that came with iMacs.
Apple support told me that they should work fine but did not offer an effective solution.
So at any rate about 70% of the time this Bluetooth keyboard works great.
But sometimes when you go to type something it starts repeating whatever key you hit so it you were to type and "a" an example the MacBookPro displays "aaaaaaaaaaaaaaa".
Sometime just a few of the same character and sometimes it does not stop.
I correct this by turning the power switch off on the Apple Bluetooth keyboard and then turn it back on and all is fine.....for a while.
Sometimes for a week or so then it will do it a lot for a while or just intermittently
The keyboard built into MacBookPro does not do this.
I think it may be the Apple Bluetooth keyboard not the MacBookPro or its OS