I didn't notice but gvfsd-metadata crashed twice and generated two core dumps:

$ gdb --core /var/cache/corefiles/core-29437-1000-1000-11-1298295051-chianamo-gvfsd-metadata /usr/lib/gvfs/gvfsd-metadata 
GNU gdb (GDB) 7.2-debian
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/lib/gvfs/gvfsd-metadata...Reading symbols from /usr/lib/debug/usr/lib/gvfs/gvfsd-metadata...done.
done.
[New Thread 29437]

warning: Can't read pathname for load map: Input/output error.

warning: .dynamic section for "/lib/libudev.so.0" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib/libpcre.so.3" is not at the expected address (wrong library or version mismatch?)
Reading symbols from /usr/lib/libgobject-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgobject-2.0.so.0.2400.2...done.
done.
Loaded symbols for /usr/lib/libgobject-2.0.so.0
Reading symbols from /lib/libglib-2.0.so.0...Reading symbols from /usr/lib/debug/lib/libglib-2.0.so.0.2400.2...done.
done.
Loaded symbols for /lib/libglib-2.0.so.0
Reading symbols from /lib/libudev.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib/libudev.so.0
Reading symbols from /lib/libdbus-1.so.3...(no debugging symbols found)...done.
Loaded symbols for /lib/libdbus-1.so.3
Reading symbols from /lib/libpthread.so.0...Reading symbols from /usr/lib/debug/lib/libpthread-2.11.2.so...done.
done.
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /usr/lib/gvfs/libgvfscommon.so...Reading symbols from /usr/lib/debug/usr/lib/gvfs/libgvfscommon.so...done.
done.
Loaded symbols for /usr/lib/gvfs/libgvfscommon.so
Reading symbols from /lib/libc.so.6...Reading symbols from /usr/lib/debug/lib/libc-2.11.2.so...done.
done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/lib/libgthread-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgthread-2.0.so.0.2400.2...done.
done.
Loaded symbols for /usr/lib/libgthread-2.0.so.0
Reading symbols from /lib/librt.so.1...Reading symbols from /usr/lib/debug/lib/librt-2.11.2.so...done.
done.
Loaded symbols for /lib/librt.so.1
Reading symbols from /lib/libpcre.so.3...(no debugging symbols found)...done.
Loaded symbols for /lib/libpcre.so.3
Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug/lib/ld-2.11.2.so...done.
done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib/libgio-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgio-2.0.so.0.2400.2...done.
done.
Loaded symbols for /usr/lib/libgio-2.0.so.0
Reading symbols from /usr/lib/libexpat.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libexpat.so.1
Reading symbols from /usr/lib/libgmodule-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgmodule-2.0.so.0.2400.2...done.
done.
Loaded symbols for /usr/lib/libgmodule-2.0.so.0
Reading symbols from /lib/libdl.so.2...Reading symbols from /usr/lib/debug/lib/libdl-2.11.2.so...done.
done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libresolv.so.2...Reading symbols from /usr/lib/debug/lib/libresolv-2.11.2.so...done.
done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /usr/lib/libz.so.1...Reading symbols from /usr/lib/debug/usr/lib/libz.so.1.2.3.4...done.
done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libselinux.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libselinux.so.1
Core was generated by `/usr/lib/gvfs/gvfsd-metadata'.
Program terminated with signal 11, Segmentation fault.

+ Trace 226111