Have you ticked a box for 2 stage verification, I have never entered a captcha when logging into the forum TD
I get Captcha'd sometimes. Corrupted cookies, browser strangeness, server strangeness etc. If it happens more I'll have a look, but mostly a passing glitch.
This is a non-political forum Clive. Now you have changed your avatar and stopped promoting the Tooting Popular Front you should have no problems.