id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	state
643	Totally double-protect Layer class	euzuro		"See #636 for more info, but the basic idea is that sometimes a layer will be a subclass of two different parent layers. then, at each step of the game, the correct way to deal with bubbling up calls to the superclass is to bubble them up to *both* superclasses. Unfortunately, as this plays itself out, that means that stuff here in layer will be getting called twice. No reason to put ourselves out so. 

I realize this isn't the most elegant thing, but it's the only way I see proper to do it. "	bug	closed	major	2.4 Release	Layer	2.4 RC1	fixed