Notably, both apps were given improvements and fixes for Photo Stream integration. iPhoto now has easier image deleting and exporting from Photo Stream, while Aperture has a bug fix related to Shared Photo Streams.
Safari and Java were also updated with improved security (release notes below). Notably, the new update introduces controls to specify which websites can use Java – something that should help prevent malicious websites from exploiting the never-ending stream of Java exploits.
Full release notes below: