I have a WordPress.org blog. I have never had a WordPress.com site. However every time I try to leave a comment on a fellow blog hosted on WordPress.com, it recognises my email address and asks me for my WordPress.com password, which of course I can't give. To make matter worse when I click the "forgotten your password" link it tells me there is no account linked with this email address. Arghhh . A total catch-22 situation and no-one to contact at WordPress!!!