Oh dear oh dear
Domainz, like many websites, has a little program to deter spammers and automated registration bots. They display a captcha which is a graphic of some letters, which generally only a human can read and type in (mind you I find a lot of spammers are getting good enough to get past them.
Stuart Parker has blogged the below screenshot from the Domainz site, which he got when trying to renew a domain name.
What are the odds?