Is there an easy way to see which topics have new content or be able to mark topics as read?  The Recent Activity icons have a different understanding of "recent".

For instance, in the Comments and Suggestions section, there is a topic from a month ago with the green icon that signifies "Recent Activity".  That doesn't seem right.  I've read it and nothing new is in there.  

I have also seen this, I usually look at the last post column which is usually correct and the recent post on the right hand side on the forums page.

I suppose it is a little embarrasing...  I don't even know what they mean or how they work either 

Perhaps a grand unified view of posts across all forums sorted by last post date could be the answer?

Sam, @samotage