Nautilus gone screwy

(n00b warning)

Dropline GNOME on Slackware 9.1 here: it looks like Nautilus has gone screwy. There are a few directories it refuses to open — I click on either the directory icon in the main view, or the name of the directory in the tree view, and the throbber in the top-right spins until kingdom come and nothing else happens.

I can ls the directories in question without a problem, and they were all accessible through Nautilus a day or two ago.

Any ideas as to what's up? Is it time I updated Dropline?

PS: oh yeah, it won't display fullsized images, either: "The image view encountered an error while starting up." Could this be related to all the "Bonobo-warning: leaked refs" I see after I exit X?