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There's a TSB (#20733) on the issue under interior. I took mine in last week for the quick fix ("repositioning the headliner" - WORKSHOP MANUAL SECTION 501-05) and haven't had any problems since.
I don't see any TSB listed for this problem (on motorcraftservice.com). However, I do have instructions for "repositioning the headliner" that are listed under Section 501-05 of the Workshop Manual. If anyone is interested, I can email a copy to you. Just PM me.