With gtk2-2.4.13-11, everytime an app tries to open the new gtk file chooser, it freezes. I tried with Epiphany, Gedit2 and Totem. This is recent, yesterday everything was working correctly, but I can't find any recent update (glibc?) that might have caused this.
I can't repeat this here. What version of gnome-vfs2 have you installed ?
This sounds exactly like the upgrade bug from FC3test. Only logout, login, and it works fine.