qtchooser-39-g4717841-3~bpo70+1 breaks qtcreator-2.5.0-2

[Émeric MASCHINO <emeric.maschino@gmail.com>]

Hi,

qtchooser-39-g4717841-3~bpo70+1 in wheezy-backports breaks
qtcreator-2.5.0-2 in a way that I can't understand:

root@longspeak:~# aptitude install qtcreator
The following NEW packages will be installed:
  libphonon4{a} qt4-demos{a} qtcreator
0 packages upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 33.0 MB of archives. After unpacking 140 MB will be used.
The following packages have unmet dependencies:
 qtchooser : Breaks: qtcreator (<= 2.6.0) but 2.5.0-2 is to be installed.
The following actions will resolve these dependencies:

      Remove the following packages:
1)      libqt4-dbus
2)      libqt4-dev
3)      libqt4-dev-bin
4)      libqt4-opengl-dev
5)      libqtwebkit-dev
6)      qdbus
7)      qt4-designer
8)      qt4-dev-tools
9)      qt4-linguist-tools
10)     qt4-qmake
11)     qt4-qmlviewer
12)     qtchooser

      Keep the following packages at their current version:
13)     libphonon4 [Not Installed]
14)     qt4-demos [Not Installed]

      Leave the following dependencies unresolved:
15)     qtcreator recommends qt4-demos
16)     qtcreator recommends qt4-dev-tools
17)     qtcreator recommends qt4-qmlviewer
18)     qt4-demos recommends qt4-dev-tools (= 4:4.8.6+dfsg-2~bpo70+1)
19)     qt4-designer recommends libqt4-dev
20)     qt4-dev-tools recommends libqt4-dev
21)     qt4-dev-tools recommends qt4-designer


Accept this solution? [Y/n/q/?]

Isn't qtcreator-2.5.0-2 <= 2.6.0?

This is on a up-to-date ia64 system.

Thanks,

     Émeric