[Candidate A] is accusing the campaign of [Candidate B] of altering an online biography of [Candidate A] to include [information that harms/embarrasses/lies about Candidate A].
In this case, Candidate A is Georgia Lt. Gov. Mark Taylor, Candidate B is Secretary of State Cathy Cox, and the offending (but accurate) information involves Taylor's son's DUI arrest.
The biography appears -- as it will in all these stories -- on Wikipedia, the huge online encyclopedia that allows any user to alter or update an entry.
So there you go. Don't say we never warned you about Wikipedia.