Thank you Man O' War, for your totally misguided post. Not only did you attempt to dismiss my concerns as frivolous, you indulged yourself with your own 'mucho angry' bitching subject. Very entertaining. Pointing out that Bryce5 may have been optimised for the Mac has nothing to do with 'platform wars', and neither does the existence of platform exclusive products. Corel could have released Bryce5 for the Mac only and it wouldn't have caused me to start frothing at the mouth and lambasting Steve Jobs. It's all a question of informed choice. If Bryce5 really is slower than Bryce4 on the PC, yet faster than Bryce4 on the Mac, then this is an important issue for potential purchasers. Whether the speed difference is by accident, neglect or is deliberate, anyone considering Bryce5 for the PC is entitled to take a dim view. Anyone considering Bryce5 for the Mac is entitled to be delighted. As a PC user, I am obviously concerned that I will be buying something that renders significantly slower than my current version, and that the program makers are possibly focussing the program on a computer platform I don't use. It is very early days, and there just aren't enough results to form a valid conclusion as yet. Hence all the 'ifs' and 'maybes', and the waiting for more information before proceeding. So far though, the fact remains that every comparative report I've seen between Bryce4/5 on the PC gives a slower result for Bryce5, while every comparative report I've seen between Bryce4/5 on the Mac gives a faster result for Bryce5.