traceback when restricted deletion/sticky bit is set on remote server

This crash occurred when I was committing to a bzr branch with the chmod restricted deletion/sticky bit set. When I removed the sticky bit, the crash ceased. I logged in manually to the ssh server where the bzr+ssh smart server was trying to store the files as the user it was attempting to do so with, and I was able to manually create, read, modify, and delete files in that path.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: bzr 2.3.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
Architecture: amd64
BzrDebugFlags: set()
BzrVersion: 2.3.4
CommandLine: ['/usr/bin/bzr', 'ci', '-m', 'Nightly commit']
CrashDb: bzr
Date: Sun Aug 28 09:47:44 2011
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426)
InterpreterPath: /usr/bin/python2.7
Locale: en_US.UTF-8
PackageArchitecture: all
Platform: Linux-2.6.38-11-generic-x86_64-with-Ubuntu-11.04-natty
ProcCmdline: /usr/bin/python /usr/bin/bzr ci -m Nightly\ commit
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
PythonVersion: 2.7.1
SourcePackage: bzr
Title: bzr crashed with ErrorFromSmartServer in _translate_error(): Error received from smart server: ('error', 'OSError', '[Errno 1] Operation not permitted')
UpgradeStatus: No upgrade log present (probably fresh install)
UserEncoding: UTF-8
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers