I just discovered that this problem also happens in 'click-to-focus' mode. It is just more annoying in 'focus-follows-mouse' mode.
When a popup is displayed, a click outside the popup window hides the popup and is passed to the window below the cursor. But that does not cause the activation of the underlying window because the window manager is not informed of that click. Basically it does not involve the 'Activate and pass click' function of the window manager. Here is a precise scenario to reproduce: - two partially overlapping konqueror windows. make sure that one can see the 'new tab' button of the lower window. - perform a quick single click on a menu of the upper konqueror window, so that the menu popup is displayed and stays there without maintaining the mouse button depressed. - move the mouse over the 'new tab' button of the lower window and perform a quick single click. The popup disappears and the 'new tab' button is triggered. But the lower konqueror window remains inactive. Going to report upstream... - L. -- focus-follow-mouse works poorly with popups https://launchpad.net/malone/bugs/39606 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs