At the first day of this month, Qt Framework 4.7.2 and Qt Creator 2.1 have been released. If you are using these on Linux or on Mac OS X, you just download and install straightforward. But if you are using on Windows, it is slightly complicated.
As you look at download page:
MinGW zip file made by Nokia. So you can download and unzip it, then install Qt 4.7.2 and Qt Creator 2.1 in order.