Yes, I tried to post this to CyberChimps´forum but registration was blocked by Sabre. So here we go:
If you run Responsive 1.9.1 and set comments form to close after X number of days (Settings-Discussion), single post meta is removed all together, not just the comments form. The date and author link is also removed.
This has to do with how post-meta-page.php is coded. If you open that file you will notice two if statements that do a check if comments are open or closed. If closed the responsive_post_meta_data function is encapsuled too, when it should be located outside of the if statement.
This was not an issue pre 1.9.0 of Responsive.