tried to load foldit on a ppc mac 10.5 os, get it won't load with this architecture.
Yes, we do not support the PPC architecture. Hope to see you back when you try with an Intel Mac (or Linux or Windows).
perhaps you should add that comment in the download area - I just tried, too, on my 10.4.11
The download button states "Intel OS X 10.4 or later".