Regular Expressions and Python 1.5.2

[Alexandre Fayolle]

Is this a known bug in the module re of python 1.5.2, or am I missing 
something obvious?

>>> import re
>>> t = "m&n"
>>> re.sub('[^/_ -]','*',t)
'***'
>>> re.sub('[^_ -/]','*',t)
'*&*'

TIA

Alexandre Fayolle
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