For some reason, my browser often freezes on this site. I've just spent time answering Snowflake and Kesh, but apparently have lost it in another browser freeze. I will have to defer rewriting it until I have more time, sorry.

Excal

Update:
This is ridiculous. My browser is freezing 9 times out 10 when I try to post to this site. Other sites are fine. Anybody know what's going on?

Never mind, I think I found the problem.