CNN.com has Webb with 9050 votes in Isle of Wight County, whereas the Virginia state website has him at 5050 votes. Allen votes agree in both places, with 6984 votes.
CNN: http://www.cnn.com/...
VA: http://sbe.vipnet.org/...
Based on other races, the number of votes cast in the district is closer to 12000 than 16000. Thus, CNN has made a mistake, overestimating Webb by 4000 votes.
Doesn't mean Webb won't still win, since VA hasn't yet taken into account all of Arlington, Fairfax, or Richmond, and CNN hasn't yet taken into account Charlottesville and the outstanding precincts in Arlington and Fairfax, but Webb is still trailing by less than 1000 votes.
When this gets fixed, I don't want to hear anything about fraud. I found this error by comparing the two websites' returns for the vote results
*UPDATE*
Webb has taken the lead now for real, but CNN did indeed fuck up Isle of Wight County by about 4000 votes in Webb's favor. Our early enthusiasm, with Webb up 3000, included this error at the time.