[stegro32]

I think (but am not certain) that when any part of an article moves past the orange triangle, it is marked as read.

[jtolj]

Yes, this. I was confused by it too until I uncovered that in a GetSatisfaction thread. If you lock it about 1/4 of the way from the top, the auto mark-read behavior is like GReader.

It should probably default to being locked...

One of my favorite things about Newsblur is how minutely configurable it is, but I think all of that is probably throwing off new users.