If you haven’t already heard, it looks like researchers have finally published code to break the Yahoo! CAPTCHA (http://unsakred.net/)(http://news.yahoo.com/s/cmp/20080118/tc_cmp/205900620). The authors only claim a 35% success rate but that is more than enough for automated bots to do their magic. The original site is at http://network-security-research.blogspot....-is-broken.html and the files are at http://rapidshare.com/files/84243632/Yahoo...nition.rar.html. I have not verified any of this so download at your own risk.