Stopping SQUID

In recent times we have had to stop our server many times due to power
outages during rebuilding. Every time we have found that a simple 'shutdown
now' hangs when trying to kill SQUID. I have found that I have to use -n (and -
h to stop the reboot) to get it to go down.
We are running Mandrake 6 and Squid2.2 Stable4.
Does this sound like a Squid problem or a Linux problem? (or even normal
behaviour?)

Cheers,

--
Simon Bryan                    sbryan@olmc.nsw.edu.au
Information Technology Manager sbryan@mpx.com.au
OLMC Parramatta