Ian Charles wrote:
Shortly after, I noticed things like /bin/ls, /usr/bin/tar, and other utilities failing.
I've noticed this, too. It seems to be related to long lines in /etc/group. See http://bugs.debian.org/208428 and http://bugs.debian.org/212541 for details.
I also could not extract any .tar.gz files. Tar failed in a similar way.
You can use "--numeric-owner" as a workaraound for tar. But better keep the old libc6 version until the problem is fixed.
Stefan