Something busted in my python install. No clue what. backintime Fails to load.

[VALETTE Eric RD-MAPS-REN <eric2.valette@orange-ftgroup.com>]

backintime-kde4
Traceback (most recent call last):
  File "/usr/share/backintime/kde4/app.py", line 43, in <module>
    from PyKDE4.kdecore import *
ImportError: No module named kdecore
6 r-ptxp-ceva6380:~->dpkg -S kdecore
python-kde4: /usr/lib/pyshared/python2.5/PyKDE4/kdecore.so
kdelibs4c2a: /usr/lib/libkdecore.so.4
kdelibs5: /usr/lib/libkdecore.so.5
kdelibs4c2a: /usr/lib/libkdecore.so.4.2.0
kdelibs5: /usr/lib/libkdecore.so.5.2.0


I removed all packages and dependencies for backintime including
python-2.5 and reinstalled  but it still fails.

Help appreciated (I know about nothing about python but I'm a faily
experienced linux developper).

-- eric