ksnapshot [--region | --freeregion] - In Gnome Classic, after double-clicking, entire screen goes white, must kill program

[eacousineau]

I can take and save screenshots via `ksnapshot -c` and `ksnapshot --fullscreen`. However, if I try to use `--region` or `--freeregion`, I am able to select the area, but upon pressing Enter / double-clicking, my entire screen turns white.

May I ask how I might begin to debug this issue and find the root cause?

This is running in Gnome Classic (No Effects), Ubuntu 12.04. About two years ago I was using xfce but then transitioned to pure Gnome, so there are some remnants of xfce.
I am using a dual-screen monitor setup on a Lenovo W530 with the Discrete Graphics mode enabled (Quadro K1000M).

[ Manual Info ]
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ksnapshot: `apt-cache policy ksnapshot`
  Installed: 4:4.8.2-0ubuntu1
  Candidate: 4:4.8.2-0ubuntu1
  Version table:
 *** 4:4.8.2-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux **** 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Architecture: amd64
Date: Mon Apr 7 11:46:10 CDT 2014
ExecutablePath: /usr/bin/ksnapshot
InstallationDate: Today
SourcePackage: ksnapshot