Comment 6 for bug 410131

after waiting about 2 weeks for any solution to be proposed
I tried on my own the following
I searched the 60 files in the directory /var/lib/apt/lists which had among them
the following 4 files:
archive.canonical.com_ubuntu_dists_jaunty_partner_binary-i386_Packages
archive.canonical.com_ubuntu_dists_jaunty_partner_source_Sources
archive.ubuntu.com_ubuntu_dists_jaunty_main_source_Sources
archive.ubuntu.com_ubuntu_dists_jaunty_restricted_source_Sources
These files seemed strange (firstly due to their html icon) and later when I opened them with text editor I saw that they had as content the default page of my router when I don't have Internet connection.
I don't know how it was stored there!!!

I deleted them with sudo rm fille_name

that seemed to work

the update manager started correctly
proposed the updates/upgrades and when I pressed install it frozen

finally I did it manually:
sudo apt-get update -f
sudo apt-get update
sudo apt-get upgrade

after many restarts!!! my system works but the update manager gets stucked / frozen / stops working when I press Check button

I don't know if that is a local problem or a problem of similar applications (synaptip/packagekit/update manager) or any other related application.

I also don't know if the above described is a solution that can work for anybody or just a mumbo jumbo of mine.