Looking at the Omni Group's update stats page (http://update.omnigroup.com) it seems that most folks that use Omni's programs are on either Tiger or Panther. Now from a programming view in Cocoa you could live without Core Data but as Cocoa bindings are in 10.3 you could use those without losing too many users. My question is this. If you were starting an app today would you target 10.3 and 10.4 or would you just use the 'universal' SDK that would allow you to compile for Intel and PPC but will mean you don't cover Panther? I've read that you can compile Intel for 10.4 and PPC for 10.3 at the same time (per-Architecture settings) but that looks pretty complicated. Has anyone done anything like this (and got it to work)?