Either I'm not getting any notifications that topics I've posted on have new comments, or the traffic on here has really slowed down. Is anyone else not getting updates through their email? I was thinking it might be something to do with the site format changes and I need to reset something.

I've missed a few. I'll get a notification and then I'll see that there have been several posts since the last time I was notified. I think the volume may be becoming a problem - - this morning for about 30 minutes I got a message that the site's server was too busy or something like that.

When I post a new subject I don't get any notifications, unless I press "Watch this topic for replies", whereas most of the topics I reply to I get emails.
Make sure you click on "Watch this topic for replies", or when you reply make sure its "Stop watching this topic" on the lower right side.

HTH