Has bignumber support changed since 1.4?

[Crowder, Brian]

It seems to be somewhat broken in 1.5.1 on Windows 95/98/NT, now...  and it
wasn't in 1.4.  When I have an immediate value that increments higher than
65535 (should become a bignum?), I get a crash in garbage collection:

free(void * 0x02b86fd8) line 956 + 11 bytes
scm_must_free(void * 0x02b86fd8) line 2128 + 9 bytes
scm_gc_sweep() line 1862 + 12 bytes
scm_igc(const char * 0x008b9da0 `string') line 1155
scm_gc() line 914 + 10 bytes
scm_ceval(scm_unused_struct * 0x02ae30a0, scm_unused_struct * 0x02ae2de8)
line 2686 + 8 bytes
scm_apply(scm_unused_struct * 0x02ae2da8, scm_unused_struct * 0x00002974,
scm_unused_struct * 0x02ae2de8) line 3605 + 221 bytes
scm_call_1(scm_unused_struct * 0x02ae3048, scm_unused_struct * 0x02ae2e08)
line 3269 + 19 bytes
CFrontEndManager::TimeSlice() line 1503 + 16 bytes
.
.
.
.

Any thoughts?

Perhaps I am configuring something wrong in the build?

--Thanks
    Brian