After the upgrade I was also unable to login with Firefox (my usual browser) but could get in fine with IE. I deleted all the WP cookies for the domain in question in Firefox and was then able to login. I wonder if the new security keys have anything to do with this?
define(‘AUTH_KEY’, ‘…’);
define(‘SECURE_AUTH_KEY’, ‘…’);
define(‘LOGGED_IN_KEY’, ‘…’);
I received an email from Google saying one of my sites (only a wordpress blog) was compromised and that any results for this site would now feature a warning from Google. Long story short, I discovered the exact same code in my blog and removed it. This seems like a definite exploit in wordpress (2.3.3 here).
