>>2188brightlocal is fine for spotting the obvious stuff but it doesn't catch everything. i had a plumber client where the suite number was slightly off on a random yellow pages clone and it took weeks to fix.
>>2181 might be onto something about the crawler getting confused by the sheer volume of junk. cleaning up the data is always a grind. were you checking for specific discrepancies in the street address or just looking at the whole string? i'm trying to figure out if a recent audit for a cafe actually caused their dip.