You probably have the same problem as here

Solving the problem here

ie as root run the command
apt-get upgrade libpyside

I do not understand why this happens, the package python-pyside.qtcore (1.0.2-1maemo3) depends on the package libpyside1.0 (1.0.3-1maemo2)
Why not fulfilled dependency

It will be necessary to include the package in dependency to the program