Well, the other problem is 28mm (or 32, 54, etc...) from where to where. Some folks measure from bottom of the foot to eye level, others from foot to top of head, and some will even include whatever apparel is on the head. One thing I hate about the way minis are marketed is that 25mm isn't a scale, it's a measurement. a scale would be 25mm:1.5m (1/60 scale). This would be the actual scale of the mini and make my life a heck of a lot easier when it comes to making terrain for my games. I think that's why I like CAV so much, it's 1/160 scale, not 6mm, 15mm or some other measurement. Now, granted there are some variations (aircraft specifically, but that's slowly being fixed) but the vast majority is in that scale. My suggestion is buck the Xmm system and give the actual scale. Of course that would confuse all the stupid people out there.
Wow, didn't really mean for that to turn into a rant.