I'm using the current trunk of pcmanfm and libfm and if I try to make a right click on an empty place pcmanfm crashes. I can't even open menus like Edit -> Preferences. It seems it crashes (or makes noting) on all actions that opens a sort of a context menu or a subwindow.
In the attachment is a very detailed log from Valgrind. The log contains just the actions to start PCManFM and to right click on an empty place.
Edit: The file is to big to upload. I used now 7z to compress the log. The archive has no password (if a password prompt appears enter an empty string).