As part of the regular maintenance at the dealer yesterday I was told that the rear wheel adjuster screws are being replaced (all three parts screws/nuts and round coupling with an indentation that goes on each side of the axel). According to the dealer the screws put on the 2007 Deluxe bikes were to small and as the miles start to accumulate and the belt stretches it becomes an issue. So anyone having a loose belt issue should inquire at the dealer for a replacement.