Shows duplicate city names when current timezone changes to one of the "Other locations"

[Alexey Kotlyarov]

Binary package hint: indicator-datetime

indicator-datetime shows duplicate entries in the menu when switching the current timezone to the one already in the "Other locations" list.

How to reproduce:
1. Set timezone to location A, add B and C as "Other locations". A, B and C can be any cities/locations.
2. From the indicator menu, set location to B.

Expected results:
A, B and C are still listed in the menu once, B ticked.

Actual results:
B is shown twice.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: indicator-datetime 0.2.3-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: wl fglrx
Architecture: amd64
Date: Mon Apr 18 11:30:34 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANGUAGE=ru_RU:en
 PATH=(custom, user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: indicator-datetime
UpgradeStatus: Upgraded to natty on 2011-04-06 (11 days ago)