I sent this to info@, but received no reply yet, so I figured I'd post it here as well in case the person who checks that address is busy or something.
I notice that ftp://ftp.squid-cache.org/pub/squid-2/STABLE/ seems to have stopped being updated after the 2.6.STABLE18 release. Consequently, none of the mirrors have 2.6.STABLE19 or 2.6.STABLE20. - Josh
