I was going to mention that pose dot, but there it is :) However, UNDO and multiple undo is a MUCH needed item....As far as low end systems, if the UNDO function is implemented correctly, there will be a menu item or preference selection to select the amount of undo levels you want...that way, low end system users can keep it at 1 or whatever works best for them, and the folks with 2gigs of ram and 50gig virtual mem can have 100 undos---very simple. I've cursed more than once at not being able to undo a move---and also the fact that in many instance the undo function is grayed out anyway in P4.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854