Please upgrade to Squid-2.6.STABLE18

Squid-2.6.STABLE18 fixes a silly bug (thanks to yours truely fixing another bug!) which may cause your Squid to crash under certain circumstances.

Squid-2.6.STABLE18-RC1 (release candidate 1) tarballs are available from the Squid website - http://www.squid-cache.org/Versions/v2/2.6/ - the release should be in a day or two.