AVG will need to update their add-ons to work with Firefox 4. You need to contact AVG to see if they have updates available yet, or when they anticipate releasing updates.

Bummer! I'll contact them and explain the situation. I guess I'll have to use I.E. if I want to see the ratings. I haven't used I.E. in a long time :-)

I contacted AVG and am waiting for a response.

Checking the AVG forums it looks like they are not far off releasing an update. A post from 5 days ago shows AVG are testing a version with Firefox support - http://forums.avg.com/ww-en/avg-free-forum?sec=thread&act=show&id=153935#post_153935

Thanks! I sent an email to AVG and received a response from someone today. They're working out the 'bug's before they release an update.