So the past couple of days when I try to reply to an email to comment on a facebook comment... I get "For your protection, email notifications sent up until November 24, 2009 are not available for commenting via email. To add a comment to one of these threads please login to the Facebook website." and it's terribly annoying... a google search finds ZERO pages about it, so feel free to comment on this post if you too are having the issue so I know I'm not alone.