Okay, I've just used 1.22a for the first time....

I too am getting:

Traceback (most recent call last):
  File "C:Program FilesSmith MicroPoser Pro 2010RuntimePythonposerscriptsPoserLuxExporter_alpha_1-22aPoserLuxExporter.py", line 231, in ?
    mat.cleanup()
AttributeError: 'module' object has no attribute 'cleanup'

The file saves, but in the materials file now, I'm getting TWO materials for each object. One named Preview and one named Default. The default is the only one we want, not the preview. The Preview material needs to be stripped out.

Laurie

Poser 8 SR3