core dumped after importing matplotlib on SunOS

Hello,

I've juste downloaded the last version (0.8) of matplotlib and
successfully built it on SunOS 5.8 with GTK backend (gcc 3.2.2).
"import matplolib" is OK but typing "from matplotlib.pylab import *"
result in a core dumped ! without any error message or exception...
"import gtk", "import pygtk", and "import wx" works OK.

I've tried with version 0.72, same error :

Python 2.4.1 (#3, Apr 14 2005, 10:58:02)
[GCC 3.2.2] on sunos5
Type "help", "copyright", "credits" or "license" for more information.

from matplotlib.pylab import *

Bus Error (core dumped)

One more thing is that after importing matplotlib, I got an error when
using help :

python
Python 2.4.1 (#3, Apr 14 2005, 10:58:02)
[GCC 3.2.2] on sunos5
Type "help", "copyright", "credits" or "license" for more information.

import matplotlib
help(matplotlib)

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/opt/SunOS/5.8/lib/python2.4/site.py", line 328,
in__call__
    return pydoc.help(*args, **kwds)
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1647, in __call__
    self.help(request)
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1691, in help
    else: doc(request, 'Help on %s:')
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1475, in doc
    pager(title % desc + '\n\n' + text.document(object, name))
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
295, in document
    if inspect.ismodule(object): return self.docmodule(*args)
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1069, in docmodule
    contents.append(self.document(value, key, name))
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
296, in document
    if inspect.isclass(object): return self.docclass(*args)
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1193, in docclass
    lambda t: t[1] == 'method')
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1143, in spill
    name, mod, object))
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
297, in document
    if inspect.isroutine(object): return self.docroutine(*args)
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line
1254, in docroutine
    doc = getdoc(object) or ''
  File "/opt/SunOS/5.8/lib/python2.4/pydoc.py", line 75,
in getdoc
    result = inspect.getdoc(object) or inspect.getcomments(object)
  File "/opt/SunOS/5.8/lib/python2.4/inspect.py", line
448, in getcomments
    lines, lnum = findsource(object)
  File "/opt/SunOS/5.8/lib/python2.4/inspect.py", line
437, in findsource
    if pat.match(lines[lnum]): break
IndexError: list index out of range

I really don't know where to begin to isolate the problem.
Do I missed an option in the build process to have some kind of debug ?
What can I do to help you better understand the problem ?

Thank you in advance for your help,