Oppa ... sorry.
Here's the comment to the file i posted above:
The same problem for me. It seems the thumbnailer also hangs when
invalid files are located in the respective directory. During some tests
I had to mess around with files (PDFs) and created random data with PDF
file signature preceedin
** Attachment added: "t.pdf"
http://launchpadlibrarian.net/35967274/t.pdf
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Nautilus "hangs" trying to generate thumbnail previews in folder
https://bugs.launchpad.net/bugs/479679
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I just experienced the same problem... gnome just crashes and i find
myself on the login screen (almost seems like a logout, because it
doesn't blank the screen as if X crashed). Pulse Audio might be the
problem ... at least my /var/log/messages tells something suspicious.
hope it helps
[Ubuntu V