May the cursed bean-counters at VeriSign grow hives on their various anatomical parts!
Who knows how much validity / sanity check code they have broken with their money-grubbing scheme? One of the most useful (to people who deal with email registration issues) modules now doesn't work quite right. Great! I've always disabled the SMTP authentication (too much overhead for large lists), and relied on all of the other checks to filter out a majority of the bad addresses. This will certainly reduce the effectiveness of the module for me.
Not to mention every other program that has ever been written to check for domain validity is probably now broken. But to break perl modules! The inhumanity!!!