In a recent non-patent case at the Federal Circuit that concerned the interpretation of government agency regulations, Chattler v. U.S., 2010-1066 (Fed. Cir. Jan. 10, 2011), Judge Dyk had some pointed words for the Department of Justice [Listen]. In the end, however, the majority including Judge Dyk ruled in favor of the United States.
You can read the opinion here: [Read].
You can listen to the entire oral argument here: [Listen].