looks like the gtk 2.6 treeview selector problem thingy is affecting the WM theme list as well. might not be a big deal, since 2.6.1 is out (which probably has a fix for it in gtk), but it might be nice to put the workaround in as well, for xfce 4.2.1 anyway.
That was fixed at the same time it was for the rest of the tree views if I'm not mistaken.
/me restarts mcs this time, and then reminds self not to submit bug reports so late at night marking RESOLVED STUPID.