Qt 5.1 Release Candidate is out!
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https://blog.qt.digia.com/blog/2013/06/18/qt-5-1-release-candidate-available/
Unfortunately, it looks like a fix required for CMake on Windows "did not make it in time":http://lists.qt-project.org/pipermail/development/2013-June/011360.html. It will be in the final release, however.
