CAPTCHA Blindness

I played Half Life Episode 2 and Portal over the weekend. EP2 was good, Portal was brilliant (and many props to Coulton for the awesome credits song).

Anyway I was trying to search the Steam forums and you have to prove you're human by entering a CAPTCHA. I got so many wrong I gave up. Here's a small sampling:

    

Can you guys read any of these? I had to check with friends to make sure I hadn't suddenly become colorblind or something.

Early data points to Valve's CAPTCHA algorithm sucking and my vision being fine.