<type 'exceptions.AttributeError'>: 'Transaction' object has no attribute 'gettest'

[litfer]

Binary package hint: aptdaemon

can't install unity desktop

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: aptdaemon 0.41+bzr597-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.35-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
Annotation: Applying software changes failed
Architecture: i386
Date: Fri Mar 18 11:24:02 2011
DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
ExecutablePath: /usr/sbin/aptd
PackageArchitecture: all
SourcePackage: aptdaemon
Title: <type 'exceptions.AttributeError'>: 'Transaction' object has no attribute 'gettest'
TransactionDepends: [[], [], [], [], [], [], []]
TransactionErrorCode: error-unknown
TransactionKwargs: {}
TransactionLocale: en_PH.UTF8
TransactionOutput:

TransactionPackages: [[dbus.String(u'unity')], [], [], [], [], []]
TransactionRole: role-commit-packages
UpgradeStatus: Upgraded to natty on 2011-03-17 (0 days ago)