I've set my Tomcat server up to gzip files of appropriate types, but for some reason it doesn't seem to be working on two files (according to YSlow). These files don't seem to be special, both are minified. One is fairly large (~328k), the other is medium-sized (72k). Here are the additional lines added to the http connector: compression="on" compressionMinSize="2048" noCompressionUserAgents="gozilla, traviata" compressableMimeType="text/html, text/xml, text/javascript, text/css" Unix file permissions and ownership are identical to other js files which are being gzipped correctly. Any thoughts?