Because we've seen many bridges on this river. Usually, we see them float past after washing out...

Let me quote the start of the thread tutorial in version 5.6.0:

WARNING: Threading is an experimental feature.  Both the interface
           and implementation are subject to change drastically.  In fact, this
           documentation describes the flavor of threads that was in version
           5.005.  Perl 5.6.0 and later have the beginnings of support for
           interpreter threads, which (when finished) is expected to be
           significantly different from what is described here.  The information
           contained here may therefore soon be obsolete.  Use at your own risk!

The river is rising... better grab an oar.

Paris Sinclair    |    4a75737420416e6f74686572
pariss@efn.org    |    205065726c204861636b6572
I wear my Geek Code on my finger.