Hello!
I could use some help with my Debian installation. It is crashing continually and dmesg says these files have segfaults:

pool: segfault at 40 ip .... sp .... libglib-2.0.so.0.3200.4[]
apt-get: segfault at f...... ip..... sp error 7 in libapt-pkg.so.4.12.0[]

and tons of this error while trying to copy files to a new HD:
gvfsd-metadata: segfault at error 4 in gvfsd-metadata[8048000_d000]

I tried apt-get remove reinstall libglib-2.0.so but got an error and the remove reinstall wasn't performed.

Can anyone advise how I should proceed?

The problem could be a RAM fault. Try booting from a Linux DVD and running its memory test, or using memtester
http://pyropus.ca/software/memtester/

I considered that and removed one of the two RAM sticks at a time and tried restarting, to no avail :-(

Searching for libglib suggests badness. It appears to be a critical file.

If "apt-get remove reinstall libglib-2.0" is exactly what you entered, you would get an error message (and, by the way, it does help if you tell us what the messages are!) apt-get needs a package name, not a file name: just libglib.

I'm no expert on apt-get (I haven't used it for some time), but I think the command should be
apt-get remove libglib && apt-get install glib

Is your installation a recent one? In that case, it might just be that you installed from a corrupted source.

Yes, apt-get install --reinstall libglib worked and fixed the problem :-)
I was running Debian 7.4, frequently updated.
Thanks everyone!

Also: one RAM module turned out to be faulty, which presumably initiated the segfault in the first place.
While the RAM was in the Notebook, the system was unstable after 3 minutes. When I tried testing the suspect RAM module by itself with MemTest+, I got a black screen error, which said it all.