I've made a topic before (here: http://en.forums.wordpress.com/topic/changing-my-email-address-doesnt-work?replies=3#post-1174958%23postform), but I still have the same problem.
In the support topics of how to delete an account it says:
"Note: It may take some time for our system to completely release your e-mail address for use with another account. Please be patient, but if the delay seems longer then normal, please contact support for further assistance."
It's been 8 months since I tried to change my email address, and the old one is still being associated with my account. The new email address is in all the right fields, both Settings --> Account and Personal settings in the dashboard. It's getting highly irritating trying to comment on other wordpress blogs and always be prompted to log in - with the email address that shouldn't have anything to do with my wordpress account anymore.