I haven't had a chance to dig into this in detail yet, but in testing, gzip doesn't appear to be working with https vhost, with valid or self signed cert. With http vhost, it is on. gzip is enabled in the nginx.conf file, so not sure why https is getting disabled. This is with latest beta and testing against Check GZIP compression using default settings. Any idea @eva2000, I won't be able to dig into this until tomorrow afternoon again.