Unable to post to Facebook

Hi,

I’ve been using the plugin for a while and today I got this message:

Social failed to broadcast the blog post “December Update” to one or more of your Social accounts.

Facebook: (My name) (Error validating access token: The session has been invalidated because the user has changed the password.)
Possible fixes:
Social was not successful in broadcasting this post (perhaps the service is down?), please try broadcasting again. If you receive this message repeatedly, you can try the support forums.

I’ve disabled the plugin, I’ve relinked my account, I’ve tried reposting. Nothing. Twitter is fine which makes me think its a FB thing but I was wondering if anyone else has had this.

Ta.

http://wordpress.org/plugins/social/