Another Seventh Circuit judge is in hot water these days, and no, it's not for forgetting a case for a few years this time. Judge Posner, perhaps one of the highest profile judges in the federal courts, minus only those on SCOTUS, came under fire after he did his own Internet research on a case -- and citing Wikipedia in the process.
The case involved a prisoner suing pro se after prison officials took away his medication. His suit was originally tossed out, only to be revived in part because Judge Posner did his own research to show that a genuine factual dispute existed, relying on information that wasn't submitted by the parties or present during trial. As Judge David Hamilton noted in his dissent, that goes beyond the "permissible boundaries" of an appellate court.