Nokia announced the release of Qt 4.5.3 today. It is a bug release version leading up to 4.6.0.
I updated area51 branches/qt-4.5 to 4.5.3. It is not quite ready for general use at this time. Contributors are welcome to check it out and provide patches as needed to make it build.
On a related note, KDE 4.3.2 will be tagged soon, so we need to decide what version of Qt to run with, feedback to [email protected] is appreciated