Using ActsAsFerret, model changes aren't handled

I’ve been using Ferret and ActsAsFerret successfully for about a month.
I’ve run into problems, though, when my model changes. If I add new
attributes to be indexed, I find that their values aren’t updated in the
index as I add model objects. If I rebuild the index from scratch, it
works fine. I just can’t get the steady state to work.

Is there something I need to do to tell AAF to follow the new attribute?

Adam Hertz