Fresh load of 14.04.1 - addign packages back and getting"Invalid MIT-MAGIC-COOKIE-1 keyInvalid..." message. Restarted the system thinking that it may clear error and it crashed and sent you the error.
ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libqtcore4 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
Date: Sat Oct 25 23:11:19 2014
DuplicateSignature: package:libqtcore4:4:4.8.5+git192-g085f851+dfsg-2ubuntu4:cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtCore.so.4.8.6' to '/usr/lib/i386-linux-gnu/libQtCore.so.4.8.6.dpkg-new': unexpected end of file or stream
ErrorMessage: cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtCore.so.4.8.6' to '/usr/lib/i386-linux-gnu/libQtCore.so.4.8.6.dpkg-new': unexpected end of file or stream
InstallationDate: Installed on 2014-10-25 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: qt4-x11
Title: package libqtcore4 4:4.8.5+git192-g085f851+dfsg-2ubuntu4 failed to install/upgrade: cannot copy extracted data for './usr/lib/i386-linux-gnu/libQtCore.so.4.8.6' to '/usr/lib/i386-linux-gnu/libQtCore.so.4.8.6.dpkg-new': unexpected end of file or stream
UpgradeStatus: No upgrade log present (probably fresh install)
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that there was an error on your system when trying to install a particular package. Please execute the following command, as it will clear your package cache, in a terminal:
sudo apt-get clean
Then try performing the update again. This will likely resolve your issue, but the failure could be caused by filesystem or memory corruption. So please also run a fsck on your filesystem(s) and a memory test. Thanks in advance!
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]