URL encoding in admin overlays - breaks overlay I have a fresh install of Drupal 7 with no content, and a few extra modules installed. Recently as I've navigated on the admin side, the URLs for the overlays have escaped HTML in them, like this:

http://mywebsite.com/#overlay=%3Fq%3Dadmin/config


Which of course is supposed to mean 

http://mywebsite.com/#overlay=?q=admin/config


But still, the overlay doesn't show up properly. 

I've found a few reports of this, but no fixes, other than to disable overlays. Can anyone offer anything?

What's tricky about this is that I can't get to administrative features because the overlays can't show up.
Apparently this error is not related to URL encoding, but the lack of overlay module support when mod_rewrite is not properly configured in the Apache web server.

See http://drupal.org/node/1337420#comment-5238454.