<type 'exceptions.UnicodeDecodeError'>: 'ascii' codec can't decode byte 0xc4 in position 21: ordinal not in range(128)

[Wnuczus]

Binary package hint: aptdaemon

I cant uninstall software and install new and update system. I have always this error now. This error been after update system 10.10 - 11.04

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 i686
NonfreeKernelModules: nvidia
Annotation: Refreshing the software list failed
Architecture: i386
Date: Fri Apr 1 22:43:48 2011
DesktopFile: /usr/share/aptdaemon/aptdaemon.desktop
ExecutablePath: /usr/sbin/aptd
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
SourcePackage: aptdaemon
Title: <type 'exceptions.UnicodeDecodeError'>: 'ascii' codec can't decode byte 0xc4 in position 21: ordinal not in range(128)
TransactionDepends: [[], [], [], [], [], [], []]
TransactionErrorCode: error-unknown
TransactionKwargs: {'sources_list': None}
TransactionLocale: pl_PL.UTF8
TransactionOutput:

TransactionPackages: [[], [], [], [], [], []]
TransactionRole: role-update-cache
UpgradeStatus: Upgraded to natty on 2011-04-01 (0 days ago)