Opera为来自挪威的一个极为出色的浏览器,具有速度快、节省系统资源、订制能力 强、安全性高以及体积小等特点,目前已经是最受欢迎的浏览器之一.多文件接口(MDI)、方便的缩放功能、整合搜索引擎、键盘截径与鼠标浏览功能、当机时 下次可以从上次浏览进度开始、防止pop-up、 Fullscreen、对HTML标准的支持、整合电子邮件与新闻群组以及让使用者自订接口按钮、skin、工具列等的排列方式,都是Opera多年来备 受喜爱的特殊功能.注意：此版本为测试版，包含了新特性和更新，但是依然存在 BUG。他可能造成频繁崩溃、私有数据的丢失，或者无法正常工作。 请在使用前阅读更新日志。强烈不建议普通用户使用。下载:Opera 9.50 (Kestrel) Build 9755 Beta

已知问题：
MIME type for executables is set to be handled by some plugin - change the configuration in your preferences to get this to work correctly.
Sparc builds will crash when initializing anything related to mail.
CPU usage will grow to 100% on UNIX when generating tooltips.

更新日志：
Even more gmail2 fixes, getting closer
More presice rounding of HSL values in css
Playing video on CNN works again
Adding links to walls on Facebook now works
Login to Open-Xchange now works
Fixed various issues on Windows Live Mail
Saving playlists on youtube should now function correctly
When in user style mode, mail and mhtml is no longer unstyled
Several favicon fixes
Fixed the line below dialog tabs in native skins
Tweaking and improvements to Windows native skins (both themed and classic) based on feedback and bug reports
Fixed a problem with wrong handling of some filetypes, including messed up display of mhtml. This was actually fixed in the last weekly but we forgot to mention. To make the fix apply if you upgrade from an older snapshot using the same installation directory, you must remove the [File Types] section in opera6.ini.
Mac: Fixed color corruption when copying images, plus we now preserve the alpha channel
Mac: Possibly fixed printing crashes on Leopard
UNIX: Plugins in symlinked directories should now not be listed twice

Windows Classic  
Macintosh  
Unix