The planned upgrade has been now been done. It only took some 15-20 minutes to resolve the few issues that popped up. More details about the changes can be found in the previous blog post.
If you already have an account on aprs.fi for posting AIS data, and you don't have your login password (it's different from the AIS feeding password, and no, you didn't have one before since there was no such thing before today), try logging in with your email address and any bad password, and you'll get to the "forgot my password" path which lets you reset the password to a new one.
As usual, there are quite a few new strings to be translated. From now on, you'll have to sign up for an account and log in to access the translation tool. I hope you don't mind.