Hello everyone,
just noticed today, that there's a FW ver.4.13 for Rev.D, which I uploaded into the router too. Captcha is now gone (I read it was flawed anyway), and no option to turn it back on (I'd do anyway).
So I'm looking for the older firmware that I was using for a year or so, which was 4.11. I found it and downgraded to it (actually, this was on another DIR615 rev.D), and guess what? No catpcha in that either!
As far as I remember, I was using 4.11-B04 (but not sure, really), whatever it means, and now I only find 4.11-B02 everywhere.
Is it possible that those FWs with buggy captcha have been removed from FTP servers worldwide?