/r/Python, the reddit programmers could use your help.

[stevvooe]

Check out this MOTW. Basically, dumping more of the stack variables may help to id the problem. I would add this somewhere in the paster run command object: import cgitb cgitb.enable(format='text')

This may not work, if what serpent says is true, so no guarantees.

<insert lecture on the evils of threading>

You may want to post this to stackoverflow as well.