Can't open Rhythmbox, Totem, Nautilus
 

I have Fedora 12 in my laptop. I can't open rhythmbox, totem movie player, nautilus etc. If I try to open through terminal, it reports that

Warning: Unable to create "trees" RDF storage.
Performance can be improved by upgrading librdf.

I have installed all plugins for playing multimedia files.

I searched for my problem but I could not find any solution. In addition to this I could not see any icons in GNOME desktop environment. If I try to open computer through PLACES in menu bar it reports that File Manager not responding.

Please somebody help me to solve my problem.

Have a look at http://www.linuxine.com/story/gstrea...pathy-songbird
Its just one example of quite a few similar links that came up when I googled for
"Fedora 12 Warning: Unable to create "trees" RDF storage"
Always try searching for the error message in Google or similar - 9/10 times the answer will be near the top of the list