I'm also having the common WP error:
ERROR: WordPress requires Cookies but your browser does not support them or they are blocked.
I've searched through the enormous amount of support topics, and I've tried everything, but nothing worked.. since yesterday afternoon, I cannot login to my WP account.. It's simply horrible, never thought that WP had such a bug like this.. :S
I have deleted my theme (changed to the standard one), deleted the plugins, etc. No chance..
Is there any development on this topic?