The Windows version of Blender now works much better with the latest (v1.5) Kyro II Drivers. Get the drivers from your manufacturer or generic drivers can be had here:
The only problems I’ve seen are when you hit ‘B’ to do a box select and when you resize windows there are trails left. This doesn’t really bother me that much really. Far better than what we had before! So if you have a box sitting around with a Kyro II card you don’t have any excuse not to blend on it now.