New Crafty source code was released today, in the Crafty newsletter Bob talks about some somewhat minor tweaks and "is very good at finding the shortest mate in a position". So version 16.18 might be more dangerous, it's hard to say.
No exe file yet, but Dann is back from his holiday so we might expect something from him in a day or 2 (?)
Pete
ps, I'm trying out pasting my url below, I havn't tried that, don't know what to expect