We are happy to announce that a new important 
update for Qt 
SDK is published.
This 
Qt SDK 1.2 update sets a new baseline for thedevelopers for a longer perspective. Some of the features have alreadybeen available as online updates, but Qt SDK 1.2 now integrates the verylatest tools, most recent mobile build targets for 
Symbian and NokiaN9, and the still fresh Qt 4.8 for desktops. We have also introducedsome improvements to the SDK and its maintenance tool.
As a summary, this is what is new in the Qt SDK:
-     Fixes for Qt Creator 2.4 in a new 2.4.1 patch update
 -     Qt 4.8 for desktops delivering Qt Quick 1.1, Qt platform abstraction, Qt WebKit 2.2, and threaded OpenGL. See Sinan’s blog post for more details.
 -     More Qt Mobility examples for Nokia N9 and Symbian devices
 -     Ability to specify network proxy setting in the SDK Maintenance Tool
 -     Update to the Symbian Complementary Package introducing Analyze Tool plugin and new CODA 1.0.6 installation package
 -     An update to Notifications API improving the end user experience and fixing issues in the Nokia N9 implementation of the API.
 
If you already have Qt SDK installed, you can update to the latestversion by running Update Qt SDK from the Qt SDK application folder onyour computer. If you first time are getting started with Qt SDK, youcan download 1.2 from our 
download page.
If you encounter problems, please file a bug report at 
http://bugreports.qt-project.org.
原文见:
http://labs.qt.nokia.com/2012/02/01/qt-sdk-1-2-released-2/