I've been having problems logging in all day. Is this happening to anyone else?

I'm using Chrome on both (Fedora) Linux and Windows 7. I can log in to my account on some profiles, but not others. Sometimes I get a 401 error, other times I'm returned to the site, but without being logged in.

Other times, I will be logged in, click on an article, and be logged out.

Is anyone else having problems, or is this just on my end?