DB8 Antenna page won't let me log in Answered

Hello,

I enjoy Instructables.com and set up a username/password quite some time ago so I could view 'ibles on a single page.

This morning, I followed a link from Lifehacker.com to https://www.instructables.com/id/Build-a-Large-DB8-HDTV-Antenna-Big-Bertha/.  Usually, when I do that, the upper right corner says "You INBOX(0) CUSTOMIZE..." -- that tells me I'm logged in.

When I hit that page, I just get the "Login" button.  If I click "Login", my username and password show up (Firefox remembers them), I click "Login" again, and it goes back to the "Login".

If I go to the home page, I'm automatically logged in, as well as going to the forum pages (or, any other page that I tried).

What gives?

rlw