synaptic fails to install two packages ~ quanta dependancy

[Dr. Anonymous]

1) OS Release: Ubuntu 9.10 (karmic)
Kernel: 2.6.31-16-generic (#53-Ubuntu SMP Tue Dec 8 04:02:15 UTC 2009)
GNOME: 2.28.1 (Ubuntu 2009-11-03)

2) Synaptic: 0.62.5

3) & 4) Selected Quanta to install in the Synaptic, and it checked automatically the dependancyes. Downloaded, but failed when tried to install it.

Maybe there is a clue: it couldn't write over those packages? (screenshot attached)

ProblemType: Package
Architecture: amd64
Date: Tue Dec 15 23:54:09 2009
DistroRelease: Ubuntu 9.10
ErrorMessage: trying to overwrite '/usr/share/doc/kde/HTML/en/kfilereplace/index.cache.bz2', which is also in package kfilereplace-kde4 4:4.2.2-0ubuntu1
NonfreeKernelModules: nvidia
Package: kfilereplace-kde3 (not installed)
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: kdewebdev-kde3
Title: package kfilereplace-kde3 (not installed) failed to install/upgrade: trying to overwrite '/usr/share/doc/kde/HTML/en/kfilereplace/index.cache.bz2', which is also in package kfilereplace-kde4 4:4.2.2-0ubuntu1
Uname: Linux 2.6.31-16-generic x86_64