virt-manager leaves resize rectangles and they won't disappear

I'm using virt-manager with a few vm's, and if I move the window with the running vm, occasionally it leaves behind an orange rectangle and it will not disappear. Only until I close down the application will the rectangle disappear. I have hit this a few times, but cannot find a reliable way to reproduce yet.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: virt-manager 0.9.3-1ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-10.10-generic 3.5.1
Uname: Linux 3.5.0-10-generic x86_64
ApportVersion: 2.4-0ubuntu8
Architecture: amd64
Date: Thu Aug 16 16:38:31 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120626.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: virt-manager
UpgradeStatus: No upgrade log present (probably fresh install)