Nice but hung my site

Nice theme, look very good, that’s why I chose it. Then came WordPress 3.7.1 and it completely messed up my 2 sites. The famous cookie error popped up three weeks ago and I had no idea what to do about it. I was unable to log in. So did many others on the WordPress forum. In my case, Appointment was the culprit. Probably because it was not updated to accomodate bugfixes in the cookie mechanism in WordPress 3.7.1. It worked fine before 3.7.x