I get the same message and yes it works, but as soon as you destroy the window, pd crashes. I think it has something to do with the GL/Mesa libs which are included in XFree86 4.1.0.
mik
Quoting Yves Degoyon ydegoyon@free.fr:
hi,
thanks for your hints, you're right, gem works if you ignore this message which seemed to me as a fatal error, but, no, after that, it "somewhat" works.
More than free internet access ... Yucom http://www.yucom.be !