Up until now (even earlier today) logging into Tumblr has worked perfectly. But I just tried to log in, and Firefox gave me this error:
The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
I've tried it with Google Chrome, and I get the same error. It only happens when I log into Tumblr, not when I'm logged out. Apparently, other users are getting this error too.
How can I fix this? Clearing cookies doesn't seem to help.