Archer on Mac exits with malloc error

[fancsali]

With a freshly complied 7.32.6 on MacOSX, archer fails to open - the splash screen shows for a brief instant, and the program exits immediately.

$ archer 
ogl_open: Can't get an appropriate visual.
archer(7183,0x1e8573a80) malloc: double free for ptr 0x136a35800
archer(7183,0x1e8573a80) malloc: *** set a breakpoint in malloc_error_break to debug
Abort trap: 6