Amos, assuming Facebook does not listen, is there a way around invalid dates? I have added the '-i' option to the refresh_pattern. I do not have any other refresh_patterns defined. I like to keep things simple if I can. Thanks, Norbert >Amos wrote: >> General: The Expires header's value isn't a valid date. > That above is probably the killer. As we get closer to HTTP/1.1 > compliance we get more things discarded for non-compliance. > > Invalid date maps to "-1" and non-cacheable. > >> refresh_pattern (cgi-bin|\?) 0 0% 0 > The pattern should be -i (/cgi-bin/|\?) for best effect. > > Any other refresh_patterns in use? Those URL look suspiciously like > ones which would be caught by trying to handle mime in refresh_pattern.