Qt Creator 2.6 Release Candidate is out!
Read Eikes blog post here: http://blog.qt.digia.com/2012/10/17/qt-creator-2-6-0-rc-released
Why is it called 2.5.84 in the setup? (Windows)
Update because it's called 2.5.84 (2.6.0-rc) when it's installed :-)
Well, it is not 2.6.0 yet, so it needs a version number bigger than the current stable 2.5.2 and smaller than 2.6.0. Some room for a release candidate 2 (if that is necessary) is also required;-)