package libqt4-script 4:4.8.4+dfsg-0: unexpected end of file or stream

[jaya shankar singh]

I am regularly getting these chrash reports. I wanted to to know thw real reason or popping up such notices

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: libqt4-script 4:4.8.4+dfsg-0ubuntu9.1
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: i386
Date: Wed Jul 3 04:28:14 2013
DuplicateSignature: package:libqt4-script:4:4.8.4+dfsg-0ubuntu9.1:cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtScript.so.4.8.4' to '/usr/lib/i386-linux-gnu/libQtScript.so.4.8.4.dpkg-new': unexpected end of file or stream
ErrorMessage: cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtScript.so.4.8.4' to '/usr/lib/i386-linux-gnu/libQtScript.so.4.8.4.dpkg-new': unexpected end of file or stream
InstallationDate: Installed on 2013-04-26 (72 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
SourcePackage: qt4-x11
Title: package libqt4-script 4:4.8.4+dfsg-0ubuntu9.1 failed to install/upgrade: cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtScript.so.4.8.4' to '/usr/lib/i386-linux-gnu/libQtScript.so.4.8.4.dpkg-new': unexpected end of file or stream
UpgradeStatus: No upgrade log present (probably fresh install)