There was a problem upgrading to Firefox 13. This error kept returning:
/var/cache/apt/archives/firefox_13.0+build1-0ubuntu0.12.04.1_i386.deb W: Waited for dpkg --assert-multi-arch but was not there - dpkgGo (10: There are no "child" processes).
Now it seems that there is some problem with dpkg and I can't install anything from software center. I already tried to clean previous packages with
sudo rm /var/lib/apt/lists/* -vf and then
sudo apt-get update, it didn't work.
sudo dpkg --configure -a, I get this:
dpkg: problems with dependencies prevent the configuration of firefox-globalmenu: firefox-globalmenu depends on firefox (= 13.0+build1-0ubuntu0.12.04.1); however: The package is not installed. dpkg: error while processing firefox-globalmenu (--configure): problems com dependencies - leaving unconfigured There has been found errors while processing: firefox-globalmenu
What should I do to fix this??
EDIT: I don't have the necessary expertise to understand why what I did worked and what was causing the conflict, but anyway, since there was a problem with
firefox-globalmenu:, I went to synaptics package manager, I removed this particular package and reinstalled it. After that, I was able to install Firefox from synaptics and also any other applications from software center.
However, still there was a problem, when running
sudo apt-get update, the following kept returning:
Failed to get gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages Verification code hash doesn't match. E: Some archives index failed at being downloaded. They have been ignored, or older copies are used instead.
So I typed
sudo rm /var/lib/apt/lists/* -vf in terminal and then again
sudo apt-get update and everything is fine now.
I did this before an answer was posted, anyway I agree the problem was that particular package and its removal. So I'll mark the below answer as accepted.