Hi Psygorn, yes it's not that hidden faces are being targeted - it's that when you do a window select face or edge sub-objects are only targeted if there is already an edge or face selection on the object or if there is a selection filter active.

So you have to "prime it" by selecting one face or edge first by some other method (like a drill-in click) then other sub objects of that type will be targeted by window select (and select all, invert too).

Since you like keyboard shortcuts maybe you would like to set up shortcut keys for turning on face or edge selection filters:
http://moi3d.com/forum/index.php?webtag=MOI&msg=8435.32

- Michael