[Plugin: WordPress MU Domain Mapping] Stops javascript functions on admin pages

When I have the domain_mapping.php file installed, all the administrative functions that require javascript (e.g. quick edit, editing permalink slugs, switching from visual to html editors) are disabled. I can click on them but nothing happens. When I delete the file, everything works again, so I’m pretty sure it’s the domain_mapping.php file.

Does anyone else have this problem and know how to fix it? Thanks!

http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/