The program worked 100% normal on Windows XP with Perl 5.8.4 and $max_prog_chan set to 60.

Once the program done all the processing (seen "xml done" printed on screen.), hit <Enter>, the program completed with no problem, other than the usual standrad warning,

A thread exited while 3 threads were running, <> line 1.
[download]

Which simply stated a fact.