I had some standard Gzip compression code running in my .htaccess file and the Hummingbird plugin said it was only triggering one of the 3 types of compression (which is not ideal). I then copy/pasted the recommended gzip compression code into my .htaccess file but when I have the plugin re-scan, it still shows that I don't have gzip compression enabled. If this matters: I'm running my sites on Rackspace.
What am I doing wrong? I'd like to get Gzip compression fully running on my sites.