Cannot log in using Opera

[adverse]

I don't know what the problem is, but I've been trying to switch my account settings into Opera, and I cannot log in!  I thought maybe it was because I was logged in in Firefox, so I had to end that session.  So I signed out in firefox, and using the same username/pass tried to log in and got:

You were unable to login. Please check your cookie settings.

So I tried deleting the cookie I have for this site, then re-trying.  Didn't work.  Anybody else having this problem?