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I'm running Drupal 5.15, and I'm noticing this really strange issue. When I go into the admin interface, and click Log Out, I get this error message in FireFox:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
If I clear the cache_page table, I can browse the site anonymously without issues, it's only when I've logged out of the front-end that I see this issue. In the Performance settings, I've chosen "Normal" caching and I'm *not* aggregating/gzipping CSS, however in the Content-Encoding of the HTTP Header I see "gzip". All browsers fail in the same way...