You need to fix the crash with Adobe Flash in Firefox 4.0.1. 4.0 works just fine. 4.0.1 sucks.
When shutting down the computer unless I close Firefox first, Adobe Flash crashes, causes it to not respond, stops the shutdown sequence and I have to go back in to Windows force close the process and then shut down. It only happens in 4.0.1. It does not happen in 4.0 on both a laptop and a desktop.