An anonymous reader writes "Microsoft has retracted their recent controversial patent application. The story was first brought to light by Slashdot on Saturday. Today, Jane Prey of Microsoft announced the retraction on the SIGCSE (Special Interest in Computer Science Education) mailing list. 'Many thanks to the members of the community that brought this to my attention — and here's the latest. The patent application was a mistake and one that should not have happened. To fix this, Microsoft will be removing the patent application. Our sincere apologies to Michael Kölling and the BlueJ community.'"