Could not initialize the package information An unresolvable problem occurred while initializing the package information. Please report this bug against the 'update-manager' package and include the following error message: 'E:Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf), E:Error occurred while processing kwrite (NewVersion1), E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_lucid-updates_main_binary-amd64_Packages, E:The package lists or status file could not be parsed or opened.'

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

I had the same problem after a failed upgrade attempt to 12.04.1 due to connectivity issues not reaching the ubuntu.com servers on all requests. I attempted to do a $sudo apt-config -o APT::Cache-Limit="50000000"; to no error or no avail. finally decided to do a $sudo rm archive.ubuntu.com_ubuntu_dists_lucid_universe_binary-amd64_Packages from /var/lib/apt/lists as this file size was over the cache limit. POOF, and it was gone. Update Manager would now run, we'll see if I can get a successful upgrade now.

Status changed to 'Confirmed' because the bug affects multiple users.