<type 'exceptions.OSError'>: [Errno 9] Bad file descriptor

Binary package hint: aptdaemon

This crash happened when "Ubuntu Software Center" is downloading (and then installing) some apps

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: aptdaemon 0.41+bzr604-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Annotation: Applying software changes failed
Architecture: amd64
Date: Sat Apr 2 00:47:57 2011
DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
ExecutablePath: /usr/sbin/aptd
SourcePackage: aptdaemon
Title: <type 'exceptions.OSError'>: [Errno 9] Bad file descriptor
TransactionDepends: [[], [], [], [], [], [], []]
TransactionErrorCode: error-unknown
TransactionKwargs: {}
TransactionLocale: en_US.UTF8
TransactionOutput:

TransactionPackages: [[dbus.String(u'seamonkey-browser')], [], [], [], [], []]
TransactionRole: role-commit-packages
UpgradeStatus: No upgrade log present (probably fresh install)