I'm starting a thread about something that I don't really understand. Maybe Sparky or others can add to it. In any case, I've read today that there's a major flaw with the DNS system and that hosts need to add a patch to make sure sites don't get exploited via nameservers.
http://news.cnet.com/8301-1009_3-10004267-83.html
So... hosting companies, have you added this patch?