I can confirm this bug und noticed something else. If I kill the background process of pcmanfm, which is triggered during startup, I can start pcmanfm.
Funny enough, on my laptop with nearly the same installation, I don't have this problem. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org