Tim Peters added the comment: Ah - good catch! I'm closing this as a duplicate of bug18966. The real mystery now is why the threads _don't_ terminate early under Windows 3.5.2 - heh. ---------- resolution: -> duplicate status: open -> closed superseder: -> Threads within multiprocessing Process terminate early _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue27508> _______________________________________