原文见：
http://blog.qt.nokia.com/2012/03/28/qt-4-8-1-libraries-for-windows-mac-and-linuxx11-released-as-stand-alone-download/ Today we release the Qt 4.8.1 libraries for those of you that target
Windows, Mac and Linux/X11. The stand-alone download of the Qt 4.8.1 libraries will be followed, in the coming weeks, by a Qt
SDK update including the updated Qt 4.8.1 libraries as well as updates in form of primary maintenance work on the Symbian and
Nokia N9 targets. So for those of you that appreciate a nice packaged SDK or target “only” Nokia
Symbian and Nokia N9, we recommend you wait for the full Qt SDK 1.2.1 release planned for April 2012.
For those using Qt for Windows, Mac and Linux/X11 who want to get Qt 4.8.1 and start using it now – download it here.
Qt 4.8.1 is the first patch release to the 4.8 series with over 200 functional improvements to the desktop and embedded platforms. The majority of the error corrections, made primarily by Digia, have been on desktop and embedded platforms with a large number of fixes with focus on QtCore, QtGUI and QtNetwork. These fixes benefit all desktop platforms. Qt 4.8.1 also includes Mac App Store support.
Digia has done a major job driving the quality of Qt 4.8 and has now added maturity to Qt with the first Qt 4.8 patch release. It is great to see all Qt developers benefit from the increased amount of resources going into the Qt ecosystem. For the details of the updates of the Qt commercial offering, please visit Digia.
