Creating Overview - Again

This is happening on Snow Leopard with Logic 9.01 and is reproducible every time. I record a bunch of tracks in a session, save and next time I open the project, it goes through the "creating overview" process drawing all the waveforms recorded in the last session, can take a few minutes if a lot of tracks were recorded. If I then save it again, and open again without recording anything new, it opens without "creating overview", anything new that gets recorded will get the "creating overview" treatment next time I open the project. Is anyone else experiencing this? and if so, is there a solution? It's driving me nuts, and if I were ever brave/insane enough to use Logic 9 in a commercial enviroment, it would be very embarrassing for clients to have to sit through that.