I'm running an image hosting cript site (duke01.net/pics).
Site was running 100% ok until yesterday when i tried to log in and got a "web page blocked" warning page. (similar to the attached pic).
After that, i get an "Invalid HTTP request" error and i can't log in... the same happens if someone tries to register or log in from other location or device.
I check all files an sub directories and everything is ok.. found no changes.. I also made a backup of everything and put that copy in other domain and ran fine. My tester and i were able to log and/or create new accounts with no warnings or error of any kind.
Just in case.. i made a fresh install of the site, but no good..
btw... i got the web page blocked only once.