mate-desktop/mate-utils — pull request #36 by NiceandGently (2013-10-02 18:26:00+00:00)
Title: disable masking for area or window screenshots

Possible fix for https://github.com/mate-desktop/mate-utils/issues/35#issuecomment-25539485
Taken from https://bugzilla.gnome.org/show_bug.cgi?id=587101