Another way to know you are up to date on threads you are part of is to.....

Top Left - click account settings

Left Side - click edit options

Look at.... Messaging & Notification / Default Thread Subscription Mode and change to Instant e-mail notification. And click Save at bottom.

At least this way you will get up to date e-mail responses in the threads you are a part of. If you havn't done this already of course!