my family also owns a new V-6 accord with the same problem. our dealer said it is a brake problem that honda has recognized. there is nothing actually wrong with the performance of the brake, just that you get that annoying thump. the dealer said they have had it in the pilot also i believe. the dealer said they have kits in to replace the noise in the pilot, but the accord kits aren't in yet but are on their way. i suggest contacting your dealer and tell him you know that honda has recognized this problem and designed a fix for it, just stay on top of them to inform you when it arrives