Have you contacted your dealer to see what they suggest? If they were unwilling to solve or correct the problem, I would put in new screws. I don't know why they use those screws, as they are definitely sharp and destructive to the mattress (not to mention people!).
I had a similar type issue, and FR's solution was to send me plastic rails that are supposed to snap OVER the existing rails. Needless to say, it wasn't really a solution, so I installed my own screws (rounded top) and caulked as needed (FR provided the caulk). So far it's worked. Unfortunately I don't have pics at the moment (Darn HOA and their rules about not allowing parking at my house), but will post some when I can.
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11' Dodge Ram 3500 DRW 6.7 Cummins
12' Rockwood Roo 233S
Current: AZ
Wife: NY
Me: IL
3 Akitas (RIP D-Dog)
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