The 5.0.4 update brings a few compatibility, stability and security fixes to Safari.

• Improved stability for webpages with multiple instances of plug-in content
• Improved compatibility with webpages with image reflections and transition effects
• A fix for an issue that could cause some webpages to print with incorrect layouts
• A fix for an issue that could cause content to display incorrectly on webpages with plug-ins
• A fix for an issue that could cause a Screen Saver to appear while video is playing in Safari
• Improved compatibility with VoiceOver on webpages with text input areas and lists with selectable items
• Improved stability when using VoiceOver