Keywords: KDE, Active window to the top
A while back, while dinking around with my KDE "System Settings" I set the "Focus stealing prevention level" to "Low" (among other changes). Some time later, I noticed that some windows which required attention were no longer popping to the top. Hmmm!???! Of course, I forgot that I had made the above change but while writing a document for KDE - specifically, see http://userbase.kde.org/KWin_Rules_Window_Attributes#Appearance_.26_Fixes - I realized my mistake.
To fix my problem, "System Settings > Window Behavior" and set "Focus stealing prevention level:" to "None"