i can't open my update manager. i get this message:
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:
'W:Duplicate sources.list entry http://archive.canonical.com/ubuntu/
precise/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-i386_Packages), E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_oneiric_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.'
plus there is an icon (a red circle with a white line in the middle) on the upper left. i really love ubuntu.. this is the first time i encountered this problem. please help...