I am using hyper cache - which is doing a great job btw.
However, in webmaster tools I am getting my sitemap.gz and then a detected sitemap.gz.gz I presume hyper cache is compressing the already compressed sitemap and Google is picking it up.
I have added various permutations in the "URI to reject" section to stop the sitemap getting cached but it doesn't seem to work (i.e. /sitemap.gz. "/sitemap.gz", full path etc.)
any help would be gratefully received,