Hmmm. So in summary it seems: Poser 5 is slow (relative to P4 on same system). How slow - and certainly how big an impact that has on user satisfaction - seems to be user specific. A hunch here: those who use still use P5 and P4 together see Poser 5 slower than others simply due to the ongoing comparison, rather than letting the "speed" of Poser 4 fade from their wetware memory banks. So "all" CL can do to address this is to rework the memory management and/or user interface code. Unlikely as a patch. Only slight hope is that they have to do this for the OSX version, and then port it back to Windoze. Lotsa ifs.