I just noticed something: Obama won exactly eight votes in the general, sure, but he had 27 votes in the primary. Um...
Not the only county where that happened, even: McMullen, Irion and Upton also cast more Obama votes in the primary than the general, although not nearly as ridiculously so.
I think Franzl's right. There were 168 counties where more Democratic primary votes were cast than Obama votes in November. It was more than twice as many in 31 counties, more than three times in 5, and more than ten times as many in King (ouch.)
It's a weirdly uneven distribution, though. In two counties (Glasscock and Reagan), the combined Democratic total was below 40% of Obama's final showing. Considering that three counties didn't even have Democratic primaries, I think there may be some inconsistencies in how the primaries were held that could cause these differences. But what kind? No idea...