Right arrow key = brightness?!

The right arrow key on my MacBook Pro (OS X 10.6.7) no longer moves the cursor right but increases brightness in finder and seemingly all other applications.

Option (Alt) + right arrow opens system preferences on the Displays page

I've restored defaults on Keyboard shortcuts but that hasn't solved it. I've had to ignore it for a while (a week or so) and just get on with stuff and so can't recall whether it started happening after an update or something...

Any clues would be extremely welcome.

Welcome to the Mac Forums.

Let's try to reset the PRAM-NVRAM. See this LINK.

Hi
Thanks chscag I followed the directions and did that but I still have the problem. Any other ideas?

Thanks again!