Comment 1 for bug 63160

This is the intended behaviour for now. The themes actually inherit all of their data from the Firefox main theme which has switched to totally incompatible widgets styles and tabs. The old themes kind of worked, but a lot of CSS has changed from 1.5 to 2.0 which makes it hard to strike a balance between the new and old look.

Anyone willing to dig into this will be welcomed and encouraged by me.