[COOT] Coot 0.52 on OSX not showing molecule

[Sam]

Hi!

I am running COOT 0.52 on MAC OSX 10.4 PPC. When coot starts, there are
errors about 

"Error loading GDEF/GSUB/GPOS table". 

Then when I read in a pdb file, the molecule is either not displayed or coot
crashes with "Bus error".

Any ideas?

-Sam