Comment 3 for bug 67694

Not sure why I'm getting email updates from this bug, but whatever.

Everything is using GTK2. The other theme you are seeing is the default GTK2 theme. Note that this is different from the theme that is set as the default for your user account (clearlooks.) You can basically think of it as unthemed.

It might or might not be possible to make programs running as root always use clearlooks, that is a possibility for "fixing" Bug #24280, which this is a duplicate of.