Maemo 5's PR1.2 comes with Qt 4.6.2
One of the biggest features of the new PR1.2 update is the arrival of Qt 4.6 for Maemo 5. After a few delays, the PR 1.2 firmware for the N900 is finally released with Qt 4.6.2 shipping by default (see maemo.org for all PR 1.2 related info). This means that all the apps that up until now only ran in the SDK can finally be deployed to real devices. The final Qt packages have the version tag 4.6.2~git20100401-0maemo1+0m5 (no April Fool's, despite the date). Qt 4.6 brings with it a large list of changes and improvements. See the Qt docs for both a summary and a detailed list.
MADDE, Platform SDK, and VMWare images updated for PR1.2
The Nokia SDK team has released updates to MADDE, the Platform SDK and it VMWare images for the PR1.2 release. Regarding MADDE, daniel wilms writes, There is a new version of the technical preview of MADDE available, so that you can cross-compile easily your Qt and C/C++ application on OS X, Linux or Windows. The update is based on PR 1.2 and contains as well the QtMobility API's. Now you can develop your application based on QtMobility, upload it to extras and the libraries will be installed automatically on every PR 1.2 device. The description, what MADDE is, how to use it with QtCreator and more you will find in the wiki. The Platform SDK and its VMWare images have also been updated to sync with the PR1.2 update, so developers interested in getting started developing for PR1.2 can now download the environment of their preference and be on their way.