继去年9月份IE9 Beta版发布之后，IE9 beta下载次数已经超过2300万，充分说明IE9受关注和期待的程度。 今天IE团队很高兴发布了IE9 RC版，欢迎大家下载试用。 距离IE9正式版发布的日子已经不远了...
IE9 RC版版本号： 9.0.8080.16413
IE9 RC for Windows7 32位下载:
http://download.microsoft.com/download/D/E/E/DEE0397B-C938-4C56-81E7-77B60915171D/IE9-Windows7-x86-chs.exe
IE9 RC for Windows7 64位下载:
http://download.microsoft.com/download/E/8/5/E8512A73-76E8-46C6-A9CF-0BE11A7E98F7/IE9-Windows7-x64-chs.exe
IE9 RC for Vista 32位下载:
http://download.microsoft.com/download/E/4/6/E466E757-4FC9-45D8-87CC-FAC249D3A834/IE9-WindowsVista-x86-chs.exe
IE9 RC for Vista 64位 下载:
http://download.microsoft.com/download/9/2/3/9239A2DC-8D0D-44E6-A0AB-1FBFF04F5411/IE9-WindowsVista-x64-chs.exe
装上IE9之后，大家不妨到IE9的官方网站 http://www.beautyoftheweb.com/ 看看，上面有详细的介绍以及大量的开发示例，全面展示HTML5以及GPU硬件加速的Power。
相比beta版，RC版有以下更新：
Performance
Elapsed Time
- Significant scenario tuning
- Chakra performance optimizations
- Network cache improvements (size, priorities, etc.)
- Compiler optimizations and binary training
Large Working Set Reductions
- Delayed image decoding (1-50MB depending on site)
- Reduce memory footprint of InPrivate Filtering heuristic generation (5MB)
- Binary size reductions (over 1MB saved)
Other Real-World
- Decrease timer resolutions to 4ms from system default of 15.6ms
- Timer resolution aware of Power Options
- Find on Page performance
Standards & Platform
CSS
- CSS3 2D Transforms
DOM
- DOM events (updated for spec changes)
HTML5
- Canvas globalCompositeOperation
- CanvasPixelArray performance
- Geolocation API
- HTML5 semantic elements
- Allow alternative video codec (WebM)
- Accessibility of media controls
Compatibility View List
- Software fallback list for GPU/drivers in XML CV list
- F12 console logs for CV sites and support for Tracking Protection
User Experience
Tabs
- Optional full tab row
- Close box for inactive tabs
- More identifiable active tab
Frame
- Paste & navigate (Ctrl+Shift+L)
- Refine search queries in onebox
- Reduced frame pixels
- Better favorites bar integration
- Menu bar toggle
- Intranet search by default option
Notifications
- Display download speed
- Auto dismiss notifications
- Animated downloads notifications
- Improved app reputation notifications
Pinned Sites
- Pin to vertical task bar
- Multiple home pages in pinned site
- In-page drag-to-pin support
Trustworthy Browsing
Tracking Protection ActiveX Filtering InPrivate
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以上更新有很多是根据网友们的反馈意见做出的改进，比如标签(Tab)上的关闭按钮，把标签栏放在地址栏下方（而不是右方）... 谢谢大家对IE9提的宝贵意见以及支持。
新的标签栏截图：
本文转自 陈本峰 51CTO博客，原文链接：http://blog.51cto.com/wingeek/490801，如需转载请自行联系原作者
