What about progressive change? Progressive change is both change and progress, simultaneously! I think your motto should be "While all progress is change, not all change is progress. Unless it is progressive change, in which case it is both progress and change, although as a general rule we are unable to say, while the progressive change is occurring, which of progress or change is the dominating factor. However, we can say with hindsight just how much change and/or progress was made, provided we have a suitably consistent measure for each of these concepts."

That's quite pithy, I think.

I like the new forum layout. Minds immeasurably superior to mine worked it out, and I think it looks like a winner!

James.