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Reassigned to me and Closed as Fixed, but it would be very 
helpful if you could build from current CVS to confirm the 
fix on your platform (I'm using a union trick to force the 
GC header to have no-looser-than-double alignment, which 
should also help on platforms that don't require 8-byte 
double alignment but run faster if doubles are 8-byte 
aligned).

Include/objimpl.h; new revision: 2.43
Modules/gcmodule.c; new revision: 2.24