I have a rather large project (~ 1Hr HD content with many, many clips).  When the project loads, the 'Progress Bar' (brown 'in-progress' bars transition to green 'completed-progress' bars before going to black 'all done') fills up considerably with brown bars, works its way through to green and then black. Each time I reload the project, Studio goes through the same exercise.  This happens even if I resave the project afterwards, and even if I resave under different project name.

Any ideas what the problem might be, or how to fix it?

Thanks.