Increasingly more of the comments I get on the blog are from many who have somehow set their comment status to no reply. You ask me questions or I would love to respond to your comment but I can't. I am not sure what has changed that so many folks now have this setting. It may have something to do with Google+.
I miss being able to respond so if you have noticed you have been leaving comments or questions on blogs but not getting answers back, this may be how you have your setting for now.
Here is a tutorial I found online to change it. If anyone else knows of a better one let me know and I will add that link.