I have a module that I was using on 2.5 that uses subprocess.Popen to monitor the output from some external programs in several different threads.  Of course, subprocess.Popen uses os.fork.  When I upgraded to 2.7 which includes this fix, this module ran into a deadlock since the fork is being executed from within an import.  One could argue that my approach is poor style but one of the goals of this module is simplicity for the users....they simply need to import it to get the functionality of the module.

Was this a desired side-effect?