Hi all (and Michael if you see this).
I am seeing a strange behaviour in OS 10.5 Leopard.
Mail launches, starts downloading mail and spam. Occasionally SpamSieve launches with two medium sized icons in the dock and after one or two bounces shuts down. A few spams get past the application at this point as it is not launched. I can re-launch SpamSieve directly and it will settle down with the full sized icon in the dock. Thereafter it works normally.
SpamSieve works fine if launched directly, before launching Mail.