Hi,
I checked disable/re-enable out of interest, it did not help.
Disabling gzip fixed the problem and sitemaps now generate, Headway recommend leaving this on (though to be honest I’ve compared load times with GTMETRIX with and without and they didn’t vary significantly, payload was around 20% more though).
HEADWAY (with GZIP enabled) and older versions of WordPress SEO worked happily together, generating XML sitemaps – any idea if this issue (if it is seen as an issue) would be fixable by one of the teams (HW/Yoast).
Thanks for your help Rubinstein.
Ben.
