Comment 5 for bug 712689

just for the record, on precise:
 $ dpkg -S /sbin/fsfreeze
util-linux: /sbin/fsfreeze
 $ dpkg-query --show util-linux
util-linux 2.19.1-2ubuntu3

Additionally, on an EC2 t1.micro instance of 'ami-410bc128' (us-east-1/ebs/ubuntu-precise-daily-amd64-server-20111212'), I just did:
$ sudo sh -c 'date; fsfreeze --freeze /; fsfreeze --unfreeze /; date'
Mon Dec 12 22:15:23 UTC 2011
Mon Dec 12 22:15:23 UTC 2011
ubuntu@ip-10-202-206-73:~$ uname -r
3.2.0-4-virtual
ubuntu@ip-10-202-206-73:~$ cat /proc/version_signature
Ubuntu 3.2.0-4.10-virtual 3.2.0-rc5

Then, just for fun
$ sudo apt-get clean
$ sudo sh -c 'apt-get update > /tmp/apt.log & sleep 2 ; date; fsfreeze --freeze /; fsfreeze --unfreeze /; date'
Mon Dec 12 22:19:27 UTC 2011
Mon Dec 12 22:19:27 UTC 2011

I redirected to /tmp/apt.log to show additional fs writes going on, and also to make output prettier. (otherwise the 'date' output is mixed with the apt output).

So, to me, this is fix-released.