I have icewm 1.2.30 (from debian). I have set ClickToFocus=0 in ~/.icewm/preferences, so focus should always be on the window on which the mouse is.
This worked until recently (probably until i upgraded from an earlier version). Now it does not work any longer. I only get focus when i click into the window but not when the mouse is over it. So this is likely a bug. Please fix it, thank you.