Last modified: 2010-11-30 14:38:26 UTC
Since the introduction of resource loader, output compression has broken for a few people (two cases that I know of). In practice, this means gzipped content is served even if Accept-Encoding: gzip is not set, and (I suspect) that doubly gzipped content is served otherwise. My changes to OutputHandler.php may be at fault, need to investigate this.
Got a confirmed bug report about this, duping this to that. *** This bug has been marked as a duplicate of bug 26130 ***