Down in FLAMES! is the best description for how Layout is working in Snow Leopard on my system.
Over the past couple of months I have had some significant crashing issues for SU pro9 but Layout has performed flawlessly - until now.
Layout opens, lets me create a new template and allowed for the importing of a SU file, but the moment an attempt to edit that SU occurs - ZAP! Layout closes. I even attempted to directly cut and paste a Sketchup model into Layout (an activity I have had success with before). The moment I "paste" Layout crashes. Hmmm! very annoying,

• sent Gaieus error code displayed for the crash.