Thanks for the update. I'm closing this report since it was caused by a
corrupted file.
Don't hesitate to submit any new bug.
** Changed in: update-manager (Ubuntu)
Status: New = Invalid
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Since the error indicated a problem with the following file:
E: Problem with MergeList /var/lib/apt/lists/us.archive.ubuntu
.com_ubuntu_dists_maverick_universe_binary-amd64_Packages
I removed the file and ran an apt-get update again, it repopulated the
file and I was able to successfully upgrade
