Problem with X11 version of GnuCash on MacOSX

[Mike Alexander]

I just updated to the current GIT head and rebuilt the X11 (not native) 
version of GnuCash on MacOS 10.8.5.  It appears that the settings 
migration might have broken this version of GnuCash.  When I launch it, 
it crashes immediately with an assert in gnc_add_stock_icon_pair 
because gdk_pixbuf_new_from_file fails with the error

Couldn't recognize the image file format for file 
'/tools/gnucash-git/install/share/gnucash/pixmaps/gnc-account.png'

Googling around a bit seems to imply that this can be caused if a 
system schema is missing.  I haven't done anything that should cause 
that to happen, and older versions of GnuCash still run fine, so I 
suspect that something has changed to remove some initialization call 
that is important in this environment, but not necessary when using a 
Gnome desktop.  Does anyone have any idea how to fix this?  My 
knowledge of GDK is limited.

            Mike