just to mirror whats already been said here , I've yet to use both poser 8 and poserpro 2010 .. every time  i do they crash constantly , the stability is probably the worst i've seen in any build of poser . atleast for me and yes they are already patched with the latest service releases ,  strangely enough my old poser pro has rock solid stability and will render just about anything  , hardly crashes and iam not even running  the latest service release .