Submitted by Qt Software (formerly Trolltech) released a new version of Qt SDK. Qt 4.5.1 includes bugfixes and optimizations made since the release of Qt 4.5.0. The list of changes can be found here. Qt Creator has been updated to reflect the feedback gathered since the initial release. A full list of changes is here. Finally, after two betas and an RC, Qt Software released the final version of the Visual Studio add-in. It is now available for download.
There is a SVG rendering bug in 4.5.1 that leads to display errors in KDE (plasma, amarok, taskbar). However, there is already a fix for this in qt-copy and Fedora also already provided an update.
See:
http://rdieter.livejournal.com/13559.html
The patch adds only one line of code:
http://websvn.kde.org/trunk/qt-copy/patches/0279-svg-rendering-regr…
then they should provide Qt 4.5.2