Hello Frédéric, Thanks for your help !
dpkg -l | grep libqt ii libqt-perl 3.008-4 Perl bindings for the Qt library ii libqt3-mt 3:3.3.8b-7+b1 Qt GUI Library (Threaded runtime version), Version 3 ii libqt4-assistant 4:4.7.2-2 transitional package for Qt 4 assistant module ii libqt4-core 4:4.7.2-2 transitional package for Qt 4 core non-GUI runtime libraries ii libqt4-dbus 4:4.7.2-2 Qt 4 D-Bus module ii libqt4-declarative 4:4.7.2-2 Qt 4 Declarative module ii libqt4-designer 4:4.7.2-2 Qt 4 designer module ii libqt4-gui 4:4.7.2-2 transitional package for Qt 4 GUI runtime libraries ii libqt4-help 4:4.7.2-2 Qt 4 help module ii libqt4-network 4:4.7.2-2 Qt 4 network module ii libqt4-opengl 4:4.7.2-2 Qt 4 OpenGL module ii libqt4-qt3support 4:4.7.2-2 Qt 3 compatibility library for Qt 4 ii libqt4-script 4:4.7.2-2 Qt 4 script module ii libqt4-scripttools 4:4.7.2-2 Qt 4 script tools module ii libqt4-sql 4:4.7.2-2 Qt 4 SQL module ii libqt4-sql-mysql 4:4.7.2-2 Qt 4 MySQL database driver ii libqt4-sql-sqlite 4:4.7.2-2 Qt 4 SQLite 3 database driver ii libqt4-svg 4:4.7.2-2 Qt 4 SVG module ii libqt4-test 4:4.7.2-2 Qt 4 test module ii libqt4-webkit 4:4.7.2-2 transitional package for Qt 4 WebKit module ii libqt4-xml 4:4.7.2-2 Qt 4 XML module ii libqt4-xmlpatterns 4:4.7.2-2 Qt 4 XML patterns module ii libqtassistantclient4 4.6.3-3 Qt Assistant client library (runtime) ii libqtcore4 4:4.7.2-2 Qt 4 core module ii libqtgui4 4:4.7.2-2 Qt 4 GUI module ii libqtlocation1 1.2.0~beta0+git3174-1 Qt Mobility Location module ii libqtmultimediakit1 1.2.0~beta0+git3174-1 Qt Mobility MultimediaKit module ii libqtscript4-core 0.1.0-3 Qt Script bindings for the Qt 4 Core library ii libqtscript4-gui 0.1.0-3 Qt Script bindings for the Qt 4 Gui library ii libqtscript4-network 0.1.0-3 Qt Script bindings for the Qt 4 Network library ii libqtscript4-sql 0.1.0-3 Qt Script bindings for the Qt 4 SQL library ii libqtscript4-uitools 0.1.0-3 Qt Script bindings for the Qt 4 UiTools library ii libqtscript4-xml 0.1.0-3 Qt Script bindings for the Qt 4 XML library ii libqtsensors1 1.2.0~beta0+git3174-1 Qt Mobility Sensors module ii libqtwebkit4 2.1.0~2011week09-1 Web content engine library for Qt Installing the missing packages (pylint, python-rope, and python-sphinx) didn't help. For the moment the dist-upgrade in Sid is a little rough, 24 packages will get removed (gimp, kaffeine, ...) , so i'm waiting till this is cleared. Bruno