Why do the Ubuntu 11.10 file/share bookmarks always disappear between sessions?

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http://askubuntu.com – Why do the Ubuntu 11.10 bookmarks (I bookmarked Shares on my Home Server) always disappear between sessions . It's very tedious to have to enter them again every time. They are not listed in my ~.gtk.bookmarks any more, just the basis stuff as below. file:///home/david/Dokumente file:///home/david/Musik file:///home/david/Bilder file:///home/david/Videos file:///home/david/Downloads file:///home/david/Ubuntu%20One Ubuntu One file:///home/david I know I could use Samba preloaded mounts, but that's what I was trying to get away from (HowTos)