Expires Header and Gzip Defate not recognized Rated 2 out of 5 stars

I have been searching high and low for a work around but no matter what I do, I get an F rating for both gzip and expires headers. Even though I can clearly see gzip is working using the net tab in Firebug, the results are the same. What gives?

This review is for a previous version of the add-on (3.1.4.1-signed).