hottrout - 7:36 pm on Sep 12, 2012 (gmt 0)
The issue seems to be with the main domain as well. I say this because googles page speed test shows images and css from the main site also not having 'Specify a cache validator'. That said to confuse me even more, when I use websniffer to investigate the header info for a gif file on the main website it tell me this :-
Date:Wed, 12 Sep 2012 17:14:58 GMT
Cache-Control:max-age=2592000, public, must-revalidate, proxy-revalidate
Expires:Fri, 12 Oct 2012 17:14:58 GMT
This would appear to be correct. What gives?