ok I don’t know if it’s just me but Ghostery’s interfering with the Tumblr navigation thingies that show up at the top of a post. The Reblog, Like, and Dashboard buttons don’t show up when I have it on.
The Tumblr interface buttons are included in an <iframe> from another
Tumblr domain, which Ghostery is probably tripping over. You need to
whitelist assets.tumblr.com; I don’t know the exact method for doing
this, but the option probably exists somewhere.