The Arbitration Committee opened one case this week, and closed three cases.

• Gundagai editors: Closed on Saturday after seven weeks, a case involving the actions of several anon IPs (possibly operated by one person), on Gundagai-related pages. As a result of the case, the unknown editor was banned for one year.

• Kven: Closed on Saturday after seven weeks, a case involving the actions of Kven-user, the name given to Art Dominique and sockpuppets on the Kven article. As a result of the case, the Kven-user was limited to one account, placed on probation, and banned from making Kven-related edits.

• GreekWarrior: Closed on Friday after three weeks, GreekWarrior, an admitted Greek nationalist extremist, received an indefinite community ban for "repeated, blatant ethnic insults and hate speech", but, owing to what Tony Sidaway described as his "great willingness to contribute", has asked that it be lifted or restricted to a finite period. Due to sockpuppetry on his part, the arbitration declined to lift the ban, but did restrict it to a period of one year; he will also be placed on probation when he returns.

• Elvis: A case involving the actions of Lochdale and Onefortyone on the Elvis Presley article.

• Bowling for Columbine: A case involving the actions of Schrodinger82 and others on the Bowling for Columbine article, and in particular his disputed removal of some criticism of the film.

• Protecting children's privacy: A case involving a policy proposal on the Wikipedia:Protecting children's privacy page. The committee is being asked to make a ruling as to the consensus requirements for the adoption of new policy.

• Non-Notability: A case regarding actions on Wikipedia:Non-notability (not to be confused with Wikipedia:Notability).

• Pseudoscience: A case involving the actions of ScienceApologist, Ian Tresman and others, involving the insertion and removal of so-called "pseudoscience" on various articles. Fred Bauder has proposed various remedies, most of which were opposed by Dmcdevit, but among those supported or not yet voted on are remedies cautioning ScienceApologist, and banning Elerner from articles relating to himself or his work.

• Ulritz: A case involving the actions of Ulritz and Rex. Rex alleges that Ulritz has engaged in a variety of disruptive behaviour, and shows a strong German nationalist bias. Various other editors allege that Rex has also engaged in a certain amount of disruption, and shows a certain Dutch nationalist bias. Dmcdevit has proposed remedies, supported by Fred Bauder, placing Rex and Ulritz on revert parole and probation for one year.

• Jean-Thierry Boisseau: A case involving the actions of Jean-Thierry Boisseau on List of major opera composers. Various users accuse him of "a course of bullying, personal attacks, and generally making things awful for all contributors". He strenuously denies the allegations. Fred Bauder has proposed remedies banning Boisseau and others attributed with Musik Fabrik from editing articles relating to their work, and placing Boisseau on probation.

• Rachel Marsden: A case involving the actions of Arthur Ellis, Rachel Marsden, Bucketsofg and others on the Rachel Marsden page. Marsden and Ellis allege that the page contains inaccurate and libellous material, and that this has been protected on the page by various admins. In response, others allege that Ellis has engaged in edit warring on the page. Fred Bauder has proposed remedies, supported by Charles Matthews banning Arthur Ellis for one day, permitting articles relating to Rachel Marsden to be stubbified, as well as other measures.

• Vivaldi: A case involving the actions of Vivaldi on Jack Hyles and related articles. Arbustoo alleges that Vivaldi has removed "cited criticism" from the article, as well as harassment, incivility and edit warring. However, an anon IP, 205.157.110.11 accuses Arbustoo of removing comments from AfDs. If closed, various articles edited by Vivaldi and Arbustoo would be placed on article probation, with the intention of removing poorly sourced material, and both contributors warned against edit-warring.