Subtle changes, bugs and feedback

New design looks good, and is much clearer on my phone, however when i try and view the site using Opera on Windows 7 i get this:

Error 403 This user-agent (web browser) is blocked from the site. Please access the site using a different browser if you believe that this is a mistake.
This user-agent (web browser) is blocked from the site. Please access the site using a different browser if you believe that this is a mistake.
Guru Meditation:
XID: 102458805
Varnish cache server

same response on different IP (neighbour's wifi)
works fine with Internet Explorer from the same computer.

Has something changed on lfgss, or have i broken my own computer somehow?