"Qt 5.0 is getting closer, and we're still working to get the final release out before the end of the year. To make this easier and also allow new development towards 5.1 to happen again, we'll branch the qt repositories during this weekend in preparation for the Release Candidate," begins a new mailing list message by Knoll.
The branching of Qt will lead to the creation of dev, stable, and release branches. The dev branch is where Qt 5.1 development will now take place, stable is where the Qt 5.0 code will move when it becomes release candidate ready, and release once it has occurred.
After already facing a delay, the Qt 5.0 final release was pushed back to August of this year, but then the beta didn't even arrive until late August. Digia buying Qt from Nokia threw a wrench into the release process as did the closure of the Qt Australia office. Now if all goes according to plan, Qt 5.0 will be officially released in the next month with a release candidate coming out in a matter of days.