Fraydo,
The Artlantis forums are really the place for this, and it sounds like you have filled out a support ticket there? (But, you posted to the Shaders forum over there - and it should have been in the "General" forum which covers crashes, installation issues, etc.)
While Abvent is working on the issue, and you mentioned there that you have stock hardware and memory ruling out memory... I have to wonder if it is related to (1) hyperthreaded Nehalem cores - giving the possibility of 16 active threads or (2) the ATI card.
Leopard does not have a CPU panel in System Preferences (by default), but I just found this article that points to a utility that is part of the Developer Tools (which you can install from your Leopard DVD - have to install it all just to get this utility, I think):
http://www.macosxhints.com/article.php?story=20071028005353629
With it, you can temporarily disable one or more cores. I would try disabling all but one core and see what happens, and then enable one core at a time until things crash again. If Artlantis runs OK with fewer cores enabled, then it is definitely an Abvent bug to be fixed. If not, it may be the ATI card and you might see if your Apple support can swap in an nVidia card to see if that makes a difference.
Is your version of Artlantis the full, licensed version, and the current 2.1.0.4 patch?
Karl
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators