Safari 5.1.7 contains improvements to performance, stability, compatibility, and security, including changes that:

- Improve the browser's responsiveness when the system is low on memory
- Fix an issue that could affect websites using forms to authenticate users
For detailed information on the security content of this update, please visit: http://support.apple.com/kb/HT1222

Safari 5.1.5 contains stability improvements.

Safari 5.1.4 contains improvements to stability, compatibility, and security, including changes that:

- Improve responsiveness when typing into the search field after changing network configurations or with an intermittent network connection
- Address an issue that could cause webpages to flash white when switching between Safari windows
- Address issues that prevented printing U.S. Postal Service shipping labels and embedded PDFs
- Preserve links in PDFs saved from webpages
- Fix an issue that could cause the screen to dim while watching HTML5 video
- Improve stability, compatibility and startup time when using extensions
- Allow cookies set during regular browsing to be available after using Private Browsing
- Fix an issue that could cause some data to be left behind after pressing the “Remove All Website Data” button

This update contains various improvements, including fixes that:

- Improve stability
- Address issues that could cause hangs and excessive memory usage
- Address issues that could cause webpages to flash white
- Allow PDFs to be displayed within web content

This update contains new features including:
- Reading List: Easily add webpages and links to your Reading List to browse when you have time.
- New Process Architecture: Safari has been re-engineered for improved stability and responsiveness.
- Resume: In the General pane of Safari preferences, you can now choose to launch Safari with the windows from your last browsing session.
- Better Privacy: A new Privacy pane in Safari preferences makes it easy to remove data that websites can leave on your system.

Other improvements include:
- Private AutoFill: Safari lets you fill out forms quickly while keeping your personal information private.
- Find Option: When you use Find, you can choose whether you want to search for text that contains or starts with the text that you type in the search field.
- Drag-and-drop Downloads: You can drag items out of the Downloads window in Safari, so you can easily place downloaded files on the Desktop.
- Advanced Web Technologies: Safari introduces support for full-screen webpages, media caching with the HTML5 application cache, MathML, Web Open Font Format, CSS3 Auto-hyphenation, CSS3 Vertical Text, CSS3 Text Emphasis, Window.onError, and Formatted XML files.
- New Extension APIs: Developers can take advantage of new Safari Extension support for popovers, menus, new event classes, and interaction with Reader.

This update is recommended for all Safari users and includes the latest security updates.

This update contains improvements to stability, compatibility, accessibility and security, including the following:

- 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

This update contains improvements to usability, compatibility, stability, accessibility and security, including the following:

- More accurate Top Hit results in the Address Field
- More accurate results in Top Sites
- Fixes an issue that could cause content delivered with the Flash 10.1 plug-in to overlap webpage content
- More reliable pop-up blocking
- Improved stability when typing into search and text input fields on www.netflix.com andwww.facebook.com
- Improved stability when using JavaScript-intensive extensions
- Improved stability when using VoiceOver with Safari

This update contains improvements to compatibility and security, including the following:

- Fixes an issue that could prevent users from submitting web forms
- Establishes an encrypted, authenticated connection to the Safari Extensions Gallery

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

This update also 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

This update contains new features including:
- Safari Reader: Click on the new Reader icon to view articles on the web in a single, clutter-free page.
- Improved Performance: Safari 5 executes JavaScript up to 25% faster than Safari 4. Better page caching and DNS prefetching speed up browsing.
- Bing Search Option: New Bing search option for Safari's Search Field, in addition to Google and Yahoo!.
- Improved HTML5 support: Safari supports over a dozen new HTML5 features, including Geolocation, full screen for HTML5 video, closed captions for HTML5 video, new sectioning elements (article, aside, footer, header, hgroup, nav and section), HTML5 AJAX History, EventSource, WebSocket, HTML5 draggable attribute, HTML5 forms validation, and HTML5 Ruby.
- Safari Developer Tools: A new Timeline Panel in the Web Inspector shows how Safari interacts with a website and identifies areas for optimization. New keyboard shortcuts make it faster to switch between panels.

Other improvements include:
- Smarter Address Field: The Smart Address Field can now match text against the titles of webpages in History and Bookmarks, as well as any part of their URL.
- Tabs Setting: Automatically open new webpages in tabs instead of in separate windows.
- Hardware Acceleration for Windows: Use the power of the computer's graphics processor to smoothly display media and effects on PC as well as Mac.
- Search History with Date: A new date indicator in Full History Search shows when webpages were viewed.
- Top Sites/History Button: Switch easily between Top Sites and Full History Search with a new button that appears at the top of each view.
- Private Browsing Icon: A “Private” icon appears in the Smart Address Field when Private Browsing is on. Click on the icon to turn off Private Browsing.
- DNS Prefetching: Safari looks up the addresses of links on webpages and can load those pages faster.
- Improved Page Caching: Safari can add additional types of webpages to the cache so they load quickly.
- XSS Auditor: Safari can filter potentially malicious scripts used in cross-site scripting (XSS) attacks.
- Improved JavaScript Support: Safari allows web applications that use JavaScript Object Notation (JSON) to run faster and more securely.

This update is recommended for all Safari users and includes improvements to performance, stability, and security including:
- Performance improvements for Top Sites
- Stability improvements for 3rd-party plug-ins
- Stability improvements for websites with online forms and Scalable Vector Graphics
- Fixes an issue that prevented Safari from changing settings on some Linksys routers

This update is recommended for all Safari users and includes improvements to performance, stability, and security including:

- Improved JavaScript performance
- Improved Full History Search performance for users with a large number of history items
- Stability improvements for 3rd-party plug-ins, the search field and Yahoo! Mail

This update is recommended for all Safari users and includes improvements to stability, compatibility and security including:

- Stability improvements for webpages that use the HTML 5 video tag
- Stability improvements for 3rd-party plug-ins
- Stability improvements for Top Sites
- Fixes an issue that prevented some users from logging into iWork.com
- Fixes an issue that could cause web content to be displayed in greyscale instead of color

This update is recommended for all Safari users and improves the stability of the Nitro JavaScript engine and includes the latest compatibility and security fixes.

This update is recommended for all Safari users and includes the latest security updates.