[gambit-list] ___H_calculate_2d_size redefinition

I'm having trouble compiling a program I've written. There seems to be a redefinition of ___H_calculate_2d_size in the generated C code. Anyone have any idea why this happened and how I might fix it?

Output: $ gsc vm.scm vm.c:6411: error: redefinition of '___H_calculate_2d_size' vm.c:6075: error: previous definition of '___H_calculate_2d_size' was here $

My system: Darwin ibook.lan 8.8.0 Darwin Kernel Version 8.8.0: Fri Sep 8 17:18:57 PDT 2006; root:xnu-792.12.6.obj~1/RELEASE_PPC Power Macintosh powerpc

powerpc-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple Computer, Inc. build 5363)

Gambit version 4.0 beta 20

--Levi