I just updated from 2.2.1 to 2.3.1 and while the frontend sites work fine, the control panel is unstyled. I have reviewed all the posts I could find and followed those suggestions but no joy. I have uploaded my cp_themes folder again, moved the folder to the system directory, dropped the db and reinstalled-reupdated twice from backup and every time there is no styling. I have removed my .htaccess and gone with none and used index.php and still no luck. I checked php settings on the server and open_basedir is not set. Host is Dreamhost. This used to work, what else can I try?
From firebug while using .htaccess and removing index.php I am showing a 404 for all the cp_themes resources. However, when I eliminate the .htaccess from the mix and run a standard index.php, the error becomes a 403 forbidden. I then chmod -R 777 the themes folder for kicks but with no effect.
At the end of my tether here.