broken dependencies of libqt4-designer etc

[oxy]

Hi guys,

i had a healthy ubuntu 14.04 system and installed some packages from a
supposedly trustable site. However now my system is stuck to a broken
dependency chain.

I tried to remove the cited pkgs below but up to now i do not know how
to repair it.

I enjoy your help!

# sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
     libqt4-designer libqtwebkit4
The following packages will be upgraded:
     libqt4-designer libqtwebkit4
2 upgraded, 0 newly installed, 0 to remove and 28 not upgraded.
6 not fully installed or removed.
Need to get 0 B/12.2 MB of archives.
After this operation, 4,759 kB of additional disk space will be used.
Do you want to continue? [Y/n]
(Reading database ... 1150398 files and directories currently installed.)
Preparing to unpack
.../libqt4-designer_4%3a4.8.5+git192-g085f851+dfsg-2ubuntu4.1_amd64.deb
...
Unpacking libqt4-designer:amd64
(4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1) over (4:4.8.1-0ubuntu4.8)
...
dpkg: error processing archive
/var/cache/apt/archives/libqt4-designer_4%3a4.8.5+git192-g085f851+dfsg-2ubuntu4.1_amd64.deb
(--unpack):
 trying to overwrite shared
'/usr/share/doc/libqt4-designer/copyright', which is different from
other instances of package libqt4-designer:amd64
Preparing to unpack .../libqtwebkit4_2.3.2-0ubuntu7_amd64.deb ...
Unpacking libqtwebkit4:amd64 (2.3.2-0ubuntu7) over (2.2.1-1ubuntu4) ...
dpkg: error processing archive
/var/cache/apt/archives/libqtwebkit4_2.3.2-0ubuntu7_amd64.deb
(--unpack):
 trying to overwrite shared
'/usr/share/doc/libqtwebkit4/changelog.Debian.gz', which is different
from other instances of package libqtwebkit4:amd64
Errors were encountered while processing:
 /var/cache/apt/archives/libqt4-designer_4%3a4.8.5+git192-g085f851+dfsg-2ubuntu4.1_amd64.deb
 /var/cache/apt/archives/libqtwebkit4_2.3.2-0ubuntu7_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)