Version: (using KDE Devel) Installed from: Compiled sources OS: Linux With twinview enabled, the "region" selector doesn't work in the secondary monitor. The rectangular selector tool is enabled only in the primary monitor. (and all the monitor is black, see bug http://bugs.kde.org/show_bug.cgi?id=152121)
It happen even with the second monitor disabled. I've made a screenshot of it.
Created attachment 22034 [details] Screenshot of ksnapshot with the "region" option. Screenshot of ksnapshot with the "region" option.
Fixed by commit 737889.
The "section of window" is only enabled in the primary monitor too. Not only the "region". the fix http://bugs.kde.org/show_bug.cgi?id=152170#c3 is for partially resolving the bug here: http://bugs.kde.org/show_bug.cgi?id=152121
Definitely fixed in trunk as of r737899.