1px of wallpaper is visible if window is maximized

[yesint]

When the window of QtCreator is maximaized there is a 1px margin between the window and the launcher at left (see screenshot). Wallpaper is visible through this gap. Looks ugly.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: qtcreator 2.4.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Mon Aug 13 10:57:17 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: qtcreator
UpgradeStatus: Upgraded to precise on 2012-07-30 (13 days ago)

[Jonathan Thomas (echidnaman)]

This is a bug with the window manager or the desktop shell. Either Unity is reporting a mis-sized panel strut, or compiz is just incorrectly placing the window.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1001100, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.