I will admit, sometimes Poser 7 takes forever with me too especially animations...It takes animations forever to render and the weird part about it, these are freaking 5 to 15 second animations, not 30 or  50 minutes. Also I figured it may be the lack of memory but then again Poser sucks sometimes. Maya never did that to me a its ten times more powerful than Poser will ever be and creates fluid animations that actually look very realistic, something Poser is not yet capable of doing at all.