SolveMedia is an ad-based captcha. I have an ancient 1.19 with it that works, but I can't get it to work with 1.26 on PHP 5.5.9. PHP in strict/warnings mode throws up: Notice: Undefined index: adcopy_challenge in /home/funsites/www/rwtest.davidgerard.co.uk/w/extensions/SolveMedia/SolveMedia.php on line 129 Notice: Undefined index: adcopy_response in /home/funsites/www/rwtest.davidgerard.co.uk/w/extensions/SolveMedia/SolveMedia.php on line 130 - but those are problems in the working version too. The official SolveMedia extension was last updated in 2012 and that's the version running on this 1.19. Has anyone got this to work on any more recent MediaWikis? (yes it's a terrible idea in several ways, but let's assume for the moment it's considered a tolerable baseline.) - d.