Jim, reading about your 'situation' immediately reminded me of my validation of the old USATF Papa John's 10 mile course in Louisville, KY. The original measurer knew they'd moved his start up significantly, but failed to impress upon the race committee how egregious a problem they faced. Hosting a Nat Champs 10 mile race on a course you know is short is NOT something I'd want on my conscience (sadly, the 10 miles came up WAY short & the original measurer didn't explain his side until the validation info was made public at that years USATF convention). What I'm leading to is this: first, communicate to the RD the nature of the problem. Assess their reaction. If the reaction doesn't involve a correction, let the RD know you plan to share that info w/others including affected participants, etc. You need to do 'the right thing' and if the integrity of the race distance is compromised, the right thing to do is let those affected know about it. You don't mess w/basic elements of races.