switch : command prompt not updated

In "bzr shell" when using the command "switch", the prompt is not updated

Example :

Let's assume this repository
repo/
repo/main
repo/work
repo/featureAAA
repo/featureBBB

if I'm working in repo/work, a checkout of featureAAA I've got this prompt :
    bzr featureAAA:88/>

if i do "cd ../featureBBB" , I'll get this prompt :
    bzr featureBBB:88/>

Back to repo/work, if I do "switch ../featureBBB", is still get this prompt :
    bzr featureAAA:88/>
Which is wrong.

Then, if I do "cd ." (change into current directory...), I get this prompt :
    bzr featureBBB:88/>
Which is good.

In other words, after a "switch" command under bzr shell, the promt needs to be updated...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bzrtools 2.5-1
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
CheckboxSubmission: 07acc21e2cd262f4bfdaa4e25a19f966
CheckboxSystem: 2a6f54df59af338184485e85cbcf0d32
Date: Wed Jul 25 11:03:30 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: bzrtools
UpgradeStatus: Upgraded to precise on 2012-06-05 (49 days ago)