Safari 5.0.1

# New:

* Safari Extensions
* Customize Safari with features created by third-party developers
* Find extensions in the Safari Extensions Gallery, accessible from the Action menu and extensions.apple.com

# Contains improvements to stability and security, including the following:

* More accurate Top Hit results in the Address Field
* More accurate timing for CSS animations
* Better stability when scrolling through MobileMe Mail
* Fixes display of multipage articles from www.rollingstone.com in Safari Reader
* Fixes an issue that prevented Google Wave and other websites using JavaScript encryption libraries from working correctly on 32-bit systems
* Fixes an issue that could cause borders on YouTube thumbnails to disappear when hovering over the thumbnail image
* Fixes an issue that prevented boarding passes from www.aa.com from printing correctly
* Fixes an issue that could cause DNS prefetching requests to overburden certain routers