Browsing the "groups" listing

First, thank you to the volunteers who are keeping this site going.  This is great!!!!  Please, keep up the good work.  I am sure this new venture has been a lot of work, and there have been a lot of bugs to work out.  Hang in there!

Now, I have a question and a possible problem to point out.

What is the difference between groups and forums?  I have looked and can't seem to find an explination.  They seem to be connected, but I can't quite figure out how. 

Also, when I select "Groups" (the main link, under my identity name, on the left of the screen) I am taken to the first page of the groups listing.  The problem is that when I scroll to the bottom, and try to go to the next page of listings... I get stuck.  A little clock icon appears, but no new page loads.  I waited... and waited... and waited some more (lol!) but nothing happened.  It makes no difference if I click "next" or "page 2", I still get the same result.  :(

I am not sure if this is a problem on my end, or yours.  Can you please enlighten me?  Thanks!

Tammy