to autoharp and others,
Just to make a couple of points of clarity (?)
'Unread posts since last visit' were posted
since the last time you logged out, and each link will take you to the last post in the relevant thread, so you might need to scroll up a thread to see other 'unread posts'.
Now, you work your way through the list reading those of interest, probably skip others. If you log out suddenly then those
'unread skipped' posts will
NOT appear in the list next time you log in. So yes, some 'unread' posts will not appear in the new list.
Also be aware that the list of 'unread posts'
can extend to more than one page; best to scroll down and click on 2 if there's 2 pages as they are the older unread posts, otherwise you will lose them and they won't appear next time.
Also while browsing
if you don't visit or re-visit the 'unread posts' list and then suddenly log out
you will lose that list and
any new additions that might have appeared. They will not appear again, so yes, again, some 'unread' posts will not appear next time you log in.
Does that make sense?
John W