R.app under OSX 10.6

I've been porting some of our in-house projects to 10.6 (Developer  
Preview 10A261) and was wondering if anyone here has been successful  
in running either R.app or tcltk under this 'snow leopard.'  The core  
app compiles and runs relatively smoothly, but I have unable to make  
either of these components work properly.  Thanks/




David Rosenberg
University of Chicago
Committee on Neurobiology
947 E 58th St
MC0928
Chicago, IL 60637
773-643-9460