I'm not sure if you simply aren't distinguishing between Tor and the Tor Browser Bundle or what, but the latest Tor version available for download that I see is 2.3.25 (latest stable one, anyway). That's the same as it was a week or two ago.As for the Tor Browser (which is really Firefox ESR setup in a specific way), that did update. To be frank, I find it awfully unlikely that the basic HTTP "protocol" would have changed in a minor release of the browser -- 17.0.5 went to 17.0.6 -- but it's not like I'm a Tor developer or something. Still... that's mighty fucking odd, mate. Are you sure that's actually the problem...?