Safari 5.0.4

Contains improvements to stability, compatibility, accessibility and security, including the following:

* Improved compatibility with webpages with transition effects
* A fix for an issue that could cause some webpages to print with incorrect layouts
* A fix for an issue that could prevent HTML5 video from playing on www.youtube.com
* A fix for an issue that could cause content to display incorrectly on webpages with plug-ins