.pyc crashes, .py doesn't

[Nick Perkins]

I'm sure this is not causing your problem, but..

It was recently discussed around here that floating-point numbers suffer a
loss of precision when they are loaded from .pyc files.

.. I wonder if there are other documented differences between the behaviour
of .pyc code and .py code?

( your experience certainly suggests that there is,
  unless you are doing something strange with floats )