Can anyone recommend some decent dark gtk themes which doesn't totally mess up firefox?
The new Gnome Themes (Gummy, Inverted, etc.) look pretty good with dark colors: Screenshot
I've no idea how they look with Firefox though. But I'd recommend Epiphany anyway since it looks quite well and is ways better than Firefox in my opinion.
Not the darkest of dark themes, but as a fan of dark themes I've finally settled on this one as a perfect compromise between the dark(ish) looks and readability/compatibility with various programs, etc.
It looks its best with the gtk-engines-svn version of clearlooks engine (with the regular version something is messed up with buttons on my computer).
Some great suggestions in this thread so far, by the way