Trouble logging in with BlogSpot

This question belongs on meta. I'd ask there, but I need to log in to ask a question, and that's where my problem is :)

I have an ID on BlogSpot.com (that's the Google Blog thing). I'm pretty sure that's my credential for this here site. However, I can't use it to log in to superuser.com (where I originally wanted to g开发者_开发百科o) although I have my user ID linked to there.

The problem is, When I try to log in with my BlogSpot ID (and correct password), I end up on a 404 page; end of the line.

Could somebody please take a look? I'd prefer to get an answer here or to carl dot smotricz @ gmail dot com, as I'm obviously unable to pick up answers on meta...

It seems that this gets solved by logging into Blogger in another tab (or browser window). Once this is done it seems to work.