I have the Clearlooks gtk2 and metacity themes installed under /usr/share/themes/Clearlooks. When I place the xfwm4 Clearlooks theme under ~/.themes/Clearlooks/xfwm4 then it does not appear in the list. When I rename it to ~/.themes/Clearlooks2/xfwm4 then it does. version is 4.2.2
Yeap, that's a know issue (the settings plugin keeps a cache of the themes and doesn't update then when the inner dirs changes)
Oops, that was a bug, fixed in SVN, both branches. Snapshots here; http://www.xfce.org/~olivier/preview/xfwm4-4.2.2-r16071.tar.bz2 http://www.xfce.org/~olivier/preview/xfwm4-4.3.0-r16067.tar.bz2