Nature (Feb. 25, 2014 doi:10.1038/nature.2014.14763) reported Publishers withdraw more than 120 gibberish papers. The publishers were IEEE and Springer and the papers were parts of conference proceedings which do not seem to have received an appropriate level of peer review. The adequacy of peer review got much discussion last October when the Bohannon "sting" was in the news. There has been a lot of discussion about these retractions also. I recommend the Retraction Watch posts and comments: Springer, IEEE withdrawing more than 120 nonsense papers and “Unfortunately, scientific publishing is not immune to fraud and mistakes”: Springer responds to fake papers story.