updated 04:03 pm EDT, Tue August 7, 2012
Differences so far hidden
(Updated with change info) Apple has released Xcode 4.4.1, a new version of the company's development suite for Mac and iOS apps. The exact content of the update is a mystery, as Apple only comments that it "runs on both OS X Lion and OS X Mountain Lion." The download is 1.46GB, and requires OS X 10.7.4 or later.
Update: Detailed release notes indicate that the software has been repackaged as a standalone app, replacing a previous Install Xcode package. Correspondingly the software now supports delta updates; Apple has in fact added a Downloads pane, through which developers can install optional components like command line tools or earlier iOS Simulators. To get Xcode 4.4.1 however people must download it through the Mac App Store, and anyone still on v4.2 won't see v4.4.1 listed as an App Store update.