
As of the third edition (June 92) the O'Reilly book (Vol 2) under

BadMatch
	Any invalid setting of a window attribute
	Attribute besides win_gravity, event_mask, do_not_propogate+mask,
	    override_redirect, or cursor specified for InputOnly window
	depth non-zero for InputOnly
	Parent of InputOutput is InputOnly
	border_width is non-zero for InputOnly
	depth or visual invalid for screen
	width or height is 0
