Let's get the important stuff out of the way: You need to update your passwords!
You can update your password by going to the Member's Area.
I've been working on a lot of behind-the-scenes stuff for this website, and one of the big changes is the way that authentication works. I'm not gonna bore you with the details, but the short story is that I'm "retiring" the old way that passwords were stored because it was pretty arbitrary and insecure.
Have you updated your password yet?
There's also a way to change your email address. You should probably take a look at that and update it as well.
Did you forget your password? There's now a "lost password" page.
Sometime in the near future, the old password scheme will stop working. Which means you won't be able to login anymore if you haven't updated your password.