The same here - after I've installed nautilus 2.30.0-1 from experimental, I ended up with "nautilus: symbol lookup error: nautilus: undefined symbol: nautilus_file_info_getter" message and no nautilus running.
Installing libnautilus-extension1 from experimental as suggested by Fabian solved this problem (thanks Fabian!) Vit -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org