I updated to FW 2.0 and had no problems, I noticed the thread re 2.0.3...initially I thought Nahhhhh, won't update as I had no issues with 2.0, in the end I succumbed and decided to update to 2.0.3...
The update completed with no apparent issues...
The next day I went out shooting, when reviewing some pics the quick selector/toggle button started to play up, I couldn't scroll up from the central position, I couldn't scroll diagonally, going into the menu, I couldn't scroll left or right or up.
I removed and replaced the batteries, which did nothing, turned the camera on and off again nothing..
After about 20 minutes trying various remedies I gave up and was reconsidering reinstalling 2.0 or 2.0.3 when I returned home.
I left the camera for another 20 minutes or so, checked it again and noticed that the "glitch" had repaired itself and the toggle button now worked....
I've had my 7D for a little over a year now, it is used every day, I've had no issues until the 2.0.3 update...
I haven't been able to repeat this issue (nor do I want to)...guess will have to wait and see if it occurs again..