Calling ConfigureWindow yields BadValue Errors as the code generation wrongly places the padding bytes after the value_list. Switching the following lines in xproto.py fixes the error: buf.write(str(buffer(array('I', value_list)))) buf.write(pack('2x', )) refer also to: http://lists.freedesktop.org/archives/xcb/2009-September/005034.html http://lists.freedesktop.org/archives/xcb/2009-October/005120.html it was apparently introduced by 57934caa3fb207320c33312646d8e98290950f51
Fixed in xcb/proto master as of now. Either recompile xpyb using xcb/proto from git, or wait until I do a release (should be soon).
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