rcParams is missing

On recent builds of matplotlib (svn and 0.90) I encounter an import error when
trying to import pylab:

import pylab

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
/pylab.py",
line 1, in <module>
    from matplotlib.pylab import *
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
/matplotlib/pylab.py",
line 199, in <module>
    import cm
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
/matplotlib/cm.py",
line 5, in <module>
    import colors
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
/matplotlib/colors.py",
line 33, in <module>
    from numerix import array, arange, take, put, Float, Int, putmask, \
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages
/matplotlib/numerix/__init__.py",
line 20, in <module>
    from matplotlib import rcParams, verbose
ImportError: cannot import name rcParams

It appears to be a numerix problem. Any idea why this is missing?