Ubuntu Software Center : strange error message

[alain.roger]

Hi,

since today i get the following error message from Ubuntu Software Center when i try to install a new software.

The following packages have unmet dependencies:

libqtcore4:i386: libqtgui4:i386: Depends: libqt4-declarative (= 4:4.7.4-0ubuntu8) but 4:4.7.4-0ubuntu8 is installed
Depends: libqtcore4 (= 4:4.7.4-0ubuntu8) but 4:4.7.4-0ubuntu8 is installed


i checked the Edit > Software Sources > Other Software and i have:


http://extras.ubuntu.com/ubuntu (source codes + standard)
http://ppa.launchpad.net/webupd8team/themes/ubuntu (standard + source code)
http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu (standard + source code)

all those are checked and all others are unchecked.

so what could be the problem ?
thx.

A.

[alain.roger]

Ok, so i solved my problem using terminal as following:
1. sudo apt-get -f install
2. remove all files having the same name but not the same version
3. once again i run sudo apt-get -f install to review if everything is ok
4. sudo apt-get update
5. and later on review if Ubuntu Software Center is ok