Thanks for the details @bulk88. Seems clear that plain stdio would be a bad idea.

> On keeping interp * in an NYTP struct, sometimes thats a good idea, but I need to do more search on it before giving you a better answer.

Any idea how soon you could look into this? (I'd really like to get Win32 support updated in the next couple of weeks, specifically before I fly to the USA and YAPC::NA.)