I too have been having this problem both on the current firmware as well as the prior version. Fortunately I'm controlling volume using rs232 on the same extender and it doesn't seem to have a problem - it's only commands issued through the IR ports - in my case my Sat receiver. I have noticed it will correct itself if I give it 10 minutes or so.

This is very discouraging. I feel for those that have speakers blown out because of it.

Philips - please help!!!!!!!