I just tried to get starting with kdevelop. Somehow I cannot get the 
development files installed:

# apt-get install libqt3-mt-dev libqt3-mt
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libqt3-mt is already the newest version.
libqt3-mt set to manually installed.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libqt3-mt-dev : Depends: libqt3-mt (= 3:3.3.8d-1ubuntu0+ax1~squeeze) but 
3:3.3.8-d-0ubuntu0+sr73+pr181~squeeze is to be installed
E: Unable to correct problems, you have held broken packages.

Any idea how to correct that?

Nik