This turned out to be one of the busiest Patch Tuesdays in a long while: Adobe, Apple and Microsoft all independently released software security updates today. Adobe patched two vulnerabilities in its PDF Reader and Acrobat software. The update applies to all supported versions of both programs on Windows, Mac and Linux systems. Adobe vulnerabilities are some of the most heavily used in targeted attacks, and they show up quite a bit in exploit kits that are sewn into hacked and malicious Web sites. So, if you use Reader or Acrobat, try not to let too much time elapse before you apply this update. Redmond issued a single update to plug at least 16 security holes in its PowerPoint software. The Microsoft Office PowerPoint update is rated critical and applies to all supported versions of PowerPoint, including Office for Mac, Microsoft Works 8.5 and 9.0, as well as various Office