"Say it ain't so! I've been teetering on the cusp of ordering P5 the last few days, so this isn't what I wanted to hear." It isn't an intrinsic problem with Poser5. Look, in a lot of ways P5 is a bigger proram than P4. It has an entirely new rendering system, dynamic hair and cloth and completely node based materials system. So it is a bit much to expect it to run on a 6 year old operating system (win 98) and a smallish computer without problems. If you can't affort a reasonably modern OS or to keep your hardware up to date then you might need to accept that there will be problems for youw ith a lot of software, not just Poser5. It's unfortunate, but true. Developers simply cannot always code for the stuff from half a decade ago.