yelp shows natty's "About Ubuntu" page in maverick

Binary package hint: yelp

In an Ubuntu Desktop Edition login session on a Maverick i386 machine with yelp package version 2.30.1-0ubuntu1, when I go to System > About Ubuntu, the page for Natty comes up. It begins: "You are using Ubuntu 11.04 - the Natty Narwhal - released in April 2011 and supported until October 2012."

This is really a Maverick system. The output of "lsb_release -rd" is:

Description: Ubuntu 10.10
Release: 10.10

And the /etc/apt/sources.list file (attached) is normal for a Maverick system.

I don't know what is causing this issue. On other Maverick boxes I've used, "About Ubuntu" does not falsely state that the distribution is Natty. If there's any more useful information I can send, please let me know.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: yelp 2.30.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic i686
NonfreeKernelModules: vmblock vsock vmci vmxnet vmhgfs
Architecture: i386
Date: Sun Dec 12 04:40:54 2010
ExecutablePath: /usr/bin/yelp
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: yelp