I'm trying to reproduce this in current trunk with the attached  
wombat color theme file and the version of color-theme.el in the  
aquamacs tree.  I load color-theme into a buffer, M-x eval-buffer,  
then load the theme itself, eval it, and finally M-x color-theme- 
wombat.  Then I try to do some file loading, editing, gnus, images,  
etc., but can't reproduce the crash (10.4).  If anyone has found some  
specific steps by now, I can try them.