Hi Thomas,
It seems that on osx with pd39.2 (launched from terminal), pyext (current or beta version) and dyn~ (current) can't be loaded jointly.
I get this error message:

------------------------------------------------
py/pyext 0.2.1pre - python script objects
(C)2002-2005 Thomas Grill - http://grrrr.org/ext

using Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)]

Python array support enabled
------------------------------------------------

link error 0  dyld: /Applications/pd39.app/Contents/Resources/bin/pd multiple definitions of symbol _ZN11TableAnyMap8iterator7forwardEv.eh
/data/pdlibs/py.pd_darwin definition of _ZN11TableAnyMap8iterator7forwardEv.eh
/data/pdlibs/dyn~.pd_darwin definition of _ZN11TableAnyMap8iterator7forwardEv.eh

dyn~: can't load library

This combination is however working fine with Hans, pd38 extended.

best regards,
vincent