[justinvh]

Hm, I think an easy way to circumvent this style of captcha with a small amount of work would be to just send every iteration to Google as a reverse image search and pick the iteration with the most results.

For example:

- Distorted image: http://goo.gl/w2ykx (bad results, not human)

- Non-distorted image: http://goo.gl/R3WnQ This is the "perfect" choice and also returns a good amount of search results.

- Slightly distorted image: http://goo.gl/G0xQN This results in a "human" choice on the picker and picks up a fair number of search-results.

I imagine 15-20 searches per captcha, but if you just pick the best per set you're probably going to end up with adequate results in circumventing the system.