WP Super Cache has an option for Super Cache Compression with the notation:
Compression is disabled by default because some hosts have problems with compressed files.I had this option enabled in my personally-hosted blog, but I just got an e-mail from a user who said they were being prompted to download GZIP'd HTML files. Unfortunately, I can't reproduce this user's symptoms. (The blog output looks fine for me in my browsers.)
Are there particular Apache modules and/or directives I need to enable to make Super Cache Compression work? I'm using Apache/2.2.14 under Gentoo.