Xubuntu 11.10 introduces some GTK3 applications which don't play well with GTK2 themed apps. Base GTK3 theme is quite ugly, so I tried a couple of themes with both gtk2/3 components like "Elegant Brit" or "Evolve". I noticed that the checkboxes are missing in quite a lot of these themes. One only sees a very slight hover effect over the checkable line, but no box. The check-mark is visible though.
For example: Audacious with Elegant Brit theme:
Is there an easy way (a simple line in some configfile) to get the checkboxes back? Maybe point me to a good guide to GTK themeing?
Is there a program to switch GTK3 themes (NOT gnome-tweak-tool, which grabs the whole gnome-shell as dependency)?