bill - 6:21 am on Jun 1, 2008 (gmt 0)

That's more of a debugging console. I'm not sure whether those errors would be the cause. Normally when I can't login with Opera, but I can with other browsers it's due to my settings. I generally don't allow anything to run except for sites that I approve.

You might also try deleting your cookies for that site, clearing your cache, and refreshing the page.