A rather weird one. I havent installed libqtm-12-contacts and I cant see it in Installed Apps either in Fapman or app manager, though libqtm-contacts is present.

I've tried removing it, I've tried apt-get with -f, Ive tried various dpkg commands, none of which have solved the issue.

Here is output:

apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these.
The following packages have unmet dependencies:
libqtm-12-contacts: Depends: libqtm-12 (= 1:1.2.0+git20111104-0nd~fremantle2) but it is not installed
E: Unmet dependencies. Try using -f.

~~

Thanks to anyone who can help

Anyone please?

Try apt-get install libqtm-12.

[Thanks] for the reply.

I did try that earlier, but here is the output:

BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ $ root


BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

Nokia-N900:~# apt-get install libqtm-12
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
libqtm-12
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
1 not fully installed or removed.
Need to get 0B/4643kB of archives.
After this operation, 17.8MB of additional disk space will be used.
(Reading database ... 31742 files and directories currently installed.)
Unpacking libqtm-12 (from .../libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb) ...
dpkg: error processing /var/cache/apt/archives/libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb (--unpack):
trying to overwrite `/opt/qtm12/plugins/versit/libqtversit_vcardpreserver.so', which is also in package libqtm-12-versit
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
/var/cache/apt/archives/libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
Nokia-N900:~#

try apt-get remove libqtm-12-contacts

or dpkg --configure -a
or dpkg --clear-avail and then apt-get update
or apt-get -f install

i got the same problem last night regarding this update packages....i solved it by...

apt-get -f install
apt-get autoremove


the first one is to fix the installation while the second one is to remove some packages that is no needed anymore after installing libqtm-12...

I got this when trying to install CSSU after I installed PR 1.3.1
I solved it by reflashing and then installing CSSU straight afterwards

Reflashing is the equivalent of Windows reinstallation in case of bugging issues; a quick but unnecessary fix IMHO. Whereas under Windows it's sometimes needed because of the relatively closed structure and missing tools, i don't see the need for in such cases as mentioned above.
I'd never reflashed my device in almost 12 months now, despite some really tempting troubles (the mrxvt/roxterm thread regarding missing xterm, f.e.).

Almost all can be fixed by dpkg, the rest with apt; often you have to force some options but you'll really learn to keep your system in control without having to rely on just one brute-force solution that to some degree always risks your data.

[Thanks!] all round for the help.

Tried the suggestions, heres the result:-

BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ $ root


BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

Nokia-N900:~# apt-get remove libqtm-12-contacts
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
libqtm-12-versit: Depends: libqtm-12-contacts but it is not going to be installed
mbarcode-plugin-qrcode: Depends: libqtm-12-contacts but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
Nokia-N900:~# dpkg --configure -a
Nokia-N900:~# dpkg --clear-avail
Nokia-N900:~# apt-get update
Get:1 http://repository.maemo.org fremantle-1.3 Release.gpg [489B]
Ign http://repository.maemo.org fremantle-1.3/free Translation-en_GB
Ign http://repository.maemo.org fremantle-1.3/non-free Translation-en_GB
Get:2 http://repository.maemo.org fremantle Release.gpg [197B]
Ign http://repository.maemo.org fremantle/free Translation-en_GB
Ign http://repository.maemo.org fremantle/non-free Translation-en_GB
Get:3 http://repository.maemo.org fremantle Release.gpg [489B]
Get:4 https://downloads.maemo.nokia.com ./ Release.gpg [198B]
Ign http://repository.maemo.org fremantle/free Translation-en_GB
Ign http://repository.maemo.org fremantle/non-free Translation-en_GB
Get:5 http://repository.maemo.org fremantle Release.gpg [489B]
Ign http://repository.maemo.org fremantle/free Translation-en_GB
Ign http://repository.maemo.org fremantle/non-free Translation-en_GB
Hit http://repository.maemo.org fremantle-1.3 Release
Ign https://downloads.maemo.nokia.com ./ Translation-en_GB
Hit http://repository.maemo.org fremantle Release
Get:6 http://repository.maemo.org fremantle Release [7953B]
Get:7 https://downloads.maemo.nokia.com ./ Release.gpg [198B]
Hit http://repository.maemo.org fremantle Release
Ign https://downloads.maemo.nokia.com ./ Translation-en_GB
Ign http://repository.maemo.org fremantle-1.3/free Packages/DiffIndex
Ign http://repository.maemo.org fremantle-1.3/non-free Packages/DiffIndex
Ign http://repository.maemo.org fremantle/free Packages/DiffIndex
Ign http://repository.maemo.org fremantle/non-free Packages/DiffIndex
Ign http://repository.maemo.org fremantle/free Packages/DiffIndex
Get:8 https://downloads.maemo.nokia.com ./ Release.gpg [481B]
Ign http://repository.maemo.org fremantle/non-free Packages/DiffIndex
Ign http://repository.maemo.org fremantle/free Packages/DiffIndex
Ign http://repository.maemo.org fremantle/non-free Packages/DiffIndex
Ign https://downloads.maemo.nokia.com ./ Translation-en_GB
Hit http://repository.maemo.org fremantle-1.3/free Packages
Hit http://repository.maemo.org fremantle-1.3/non-free Packages
Hit http://repository.maemo.org fremantle/free Packages
Hit https://downloads.maemo.nokia.com ./ Release
Hit https://downloads.maemo.nokia.com ./ Release
Hit http://repository.maemo.org fremantle/non-free Packages
Hit https://downloads.maemo.nokia.com ./ Release
Hit http://repository.maemo.org fremantle/free Packages
Get:9 http://repository.maemo.org fremantle/non-free Packages [271kB]
Hit http://repository.maemo.org fremantle/free Packages
Ign https://downloads.maemo.nokia.com ./ Packages/DiffIndex
Hit http://repository.maemo.org fremantle/non-free Packages
Ign https://downloads.maemo.nokia.com ./ Packages/DiffIndex
Get:10 https://downloads.maemo.nokia.com ./ Release [507B]
Hit https://downloads.maemo.nokia.com ./ Packages
Ign https://downloads.maemo.nokia.com ./ Release
Hit https://downloads.maemo.nokia.com ./ Packages
Ign https://downloads.maemo.nokia.com ./ Packages/DiffIndex
Hit https://downloads.maemo.nokia.com ./ Packages
Fetched 282kB in 10s (26.8kB/s)
Reading package lists... Done
W: GPG error: https://downloads.maemo.nokia.com ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ADB4438160A655EF
W: You may want to run apt-get update to correct these problems
Nokia-N900:~# 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:
libqtm-12
The following NEW packages will be installed:
libqtm-12
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
1 not fully installed or removed.
Need to get 0B/4643kB of archives.
After this operation, 17.8MB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 31742 files and directories currently installed.)
Unpacking libqtm-12 (from .../libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb) ...
dpkg: error processing /var/cache/apt/archives/libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb (--unpack):
trying to overwrite `/opt/qtm12/plugins/versit/libqtversit_vcardpreserver.so', which is also in package libqtm-12-versit
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
/var/cache/apt/archives/libqtm-12_1%3a1.2.0+git20111104-0nd~fremantle2_armel.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
Nokia-N900:~#

reboot then try it again....