Todd, I have found these functions to be very sensitive and sometimes variable.
Most of the time if you enter a posting group, stay to read one post and find you must leave and come back later, you lose the new postmarks on all the rest of the posts in that group.
Sometimes all I need do is sign in and then sign out (most often when my wife calls me to help her with something). Having done nothing but sign in and then out cancels all my new post flags.
It can get rather frustrating, BUT I don't believe it has changed with this new round of upgrades. I think that this is the way it has been all along. It is just getting bad press now. We all learned to accept better.
I still love the boards and all the hard work that the people who run and oversee this monster do to keep it running. I say a very special. thank you to you
Reggae (African Grey Parrot)
Carnival Valor Jan 8, 2006
Carnival Triumph May 12 2007
Carnival Triumph November 3,2007
Carnival Liberty November 22, 2008
Carnival Miracle March 4, 2010