From the Associated Press release:

Two Associated Press journalists sued Arkansas officials Friday for allegedly violating the state’s Freedom of Information Act by withholding information about which government computers were used to edit entries on Wikipedia.
In August, Gambrell reported that state computers were used to edit information about Republican presidential candidate and former Gov. Mike Huckabee, Beebe and others. Using a Web site called WikiScanner that tracks changes to Wikipedia, Gambrell could see that the edits were made by computers with numeric Internet addresses assigned to the state.
Huckabee’s entry was changed to delete information about a controversial pardon and his frequent use of a state-owned airplane while Beebe’s was changed to eliminate an inaccurate reference to his having a male “life partner” rather than his wife Ginger.

One of the local news stations reports on the state’s refusal to comply:

The director of the Arkansas’ Department of Information Systems said in court papers Thursday that revealing which computers were used to edit entries on the Wikipedia Web site would pose a security risk to state computers.
In the filing, Bailey said that security consultants told the department’s attorney that revealing the physical locations of five computers used to edit information about politicians on the popular site “heightens the vulnerability of that state agency and heightens the security risk to the state network.”