[plt-scheme] embedding windows/linux/osx difference

Hi all,

I've noticed a difference between windows and Linux/OSX to do with error
catching, I presume it's something to do with scheme_setjmp but I'm not
sure.

If I pass a string containing an error to scheme_eval_string_all I get a
crash on windows only. Is there something simple I'm missing in the
initialisation which could cause this? I'm using scheme_main_setup. I'm
a bit lost as to where to look next.

cheers,

dave