screenlets-manager.py crashed with OSError in show_install_theme_dialog(): [Errno 20] Not a directory: '/tmp/screenlets/install-temp/oldones.tar'

[MUBEEN]

Binary package hint: screenlets

well there's again a bug, i think so. i wanted to install a screenlets clock theme, it just crashed. i dont know why. please help me out of this.
Thank You,
Confused

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: screenlets 0.1.3-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat Apr 9 02:38:53 2011
ExecutablePath: /usr/share/screenlets-manager/screenlets-manager.py
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: python -u /usr/share/screenlets-manager/screenlets-manager.py > /dev/null
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/screenlets-manager/screenlets-manager.py', '>', '/dev/null']
SourcePackage: screenlets
Title: screenlets-manager.py crashed with OSError in show_install_theme_dialog(): [Errno 20] Not a directory: '/tmp/screenlets/install-temp/oldones.tar'
UpgradeStatus: Upgraded to natty on 2011-04-06 (2 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare