i've noticed that as the site becomes more popular it's also become more popular with spammers. It's like playing whack-a-mole, as soon as you pop this baddie, another one pops up. There are some hidden changes that should improve the user experience.
One visible change - if you are trying to register as a new user, there is a common question that anyone should be able to answer. There was previously image verification and I don't know if it works that great anyways. If you are a spammer, please leave and don't waste your time and my time.