Hey Frank,
You could use the osc externals by Martin Peach (in the "mrpeach" directory of the Subversion repository) as a comparison. Or even netreceive from standard Pd, but that only speaks the "FUDI" protocol, not OSC, so would require a rewrite of the Python script but at least FUDI is even simpler than OSC.
Mr. Peach's externals work much better. My OSC channels are now working perfectly in PD.
thx all, C