[plt-scheme] call/cc behavior in gambit-c vs. plt-scheme

Hi,

I'm no expert, but I'll give you my interpretation.

I think the difference is because mzscheme has a delimited  
continuation at the top-level so you can't capture anything beyond  
that with call/cc. And I suppose it will also "merge" the begin with  
the top-level (making it a no-op) so you won't even get the "again 
\nend" twice.

But you better wait for a reply from someone that knows mzscheme  
better :-)

   - Filipe Cabecinhas