Red indicates strong relative support for Buchanan, and blue is weak support, with white being average. Palm Beach county, the source of the current allegations of irregularity is labelled. Note that Palm Beach shows very strong Buchanan support, even though it is surrounded by counties with very little support. Due to the geography and demography of Palm Beach's location, we would expect similar results from Palm Beach as were seen in its neighboring counties. The fact that this county is deep red in a mostly blue area is perhaps evidence that something may have gone wrong.
Here is a black and white version of the same map, which shows the difference in a clearer fashion.
AT&T Labs - Research