@mre @wezm
Nice to see somebody (still) writing about this issue, and it gets worse than browser wars, did you know there is a 3rd party "security" product used on at least one prominent Mexican website that will deny access based on the string "linux" being present in the User-Agent? - can be demonstrated by simple modification to that header, but unsuspecting linux users are sent into an endless captcha loop.
@keith @wezm thanks. It's a very unfortunate state of affairs.