[natty] update-apt-xapian-index crashed with KeyError in __getitem__(): ''

[IKT]

Binary package hint: apt-xapian-index

Appeared shortly after updating natty to the latest updates.

I had changed the source mirror from the main server to a local isp.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: apt-xapian-index 0.41ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.36-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
Date: Sat Mar 19 23:47:16 2011
ExecutablePath: /usr/sbin/update-apt-xapian-index
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110318)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/sbin/update-apt-xapian-index --update -q
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/sbin/update-apt-xapian-index', '--update', '-q']
SourcePackage: apt-xapian-index
Title: update-apt-xapian-index crashed with KeyError in __getitem__(): ''
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[IKT (ikt)]

Going to set to invalid since I can't duplicate.