I'm just curious - what kind of processor are you using? An Intel, AMD/Athlon, Duron? And what speed? The reason I ask is that on my own machines, Poser consistently is smoother on the Intel cpu's. I don't claim to know why, but that it just is. Also, Poser 4 runs fine on a 233, and heck, even a Pentium133. Less code to crunch and resources to hog. But I wouldn't put Poser 5 on a 300mhz system and expect much. And to those NOT having issues (or very few issues) - what are you running? This is certainly not a claim to know the answer - but who knows, it may help demystify some issues if there are common problems with the same system specs.