Version: (using Devel) Installed from: Compiled sources It is possible to set a window to 0% opacity using a mouse action. It is then totally invisible. Attached patch limits this to 10%
Created attachment 30253 [details] patch for kwin/useractions.cpp to prevent <10% opacity using mouse actions
SVN commit 926270 by tdickenson: BUG: 180754. Prevent 0% opacity using a mouse action. Limit opacity to 10% M +1 -1 useractions.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=926270