George and William have a discussion of those times when the subject isn’t in the case you might expect it to be in.
Wikipedia on Quirky SubjectSubject cases in SadaniOblique subjects in Slavic (handout/ PowerPoint)WarlpiriComparative study with lots of examples from many languagesNon-nominative subject in OriyaOkunaAnother big comparative studyLocative inversion in Otjiherero (Bantu)