Yesterday I updated to the new SVN trunk and since then I'm unable to rightclick the desktop to show the menu. I didn't change any settings and before the upgrade it worked fine. The command "xfdesktop -menu" doesn't work either. I already tried deleting the .config directory to start without any configuration but then I have the same problem.
xfdesktop svn is a bit messy right now; if you can't get it working on your own, please don't use it.