Just recently having Firebug enabled stops overlays working on my site. I know it must be something on my site because the overlays work just fine here with Firebug enabled.
Can anyone tell me where to start looking for this problem?
I can only reproduce this when I have the console, script, and net tabs closed, but with FF's built in web console, I was able to track this down. I simply removed the line in question - it's not particularly important.