Bug in the Email validator?

Hi,
I'm currently using Formencode, and thx for the work done!

One problem I have seen is that if you create a
formencode.validators.Email(strip=True, resolve_domain=True) and then you
try to validate an email containing a "_", it fails with a
UnicodeDecodeError.
It seems to me that the strip method converts the value in unicode, and that
pyDNS is expecting a str. It would be better if pyDNS accepted Unicode, but
in my opinion, Formencode should intercept any error made during validation
and say something like "this value is not correct". What do you think?

Thanks,
Pierre

Here is the stack of the error:
File
'/usr/lib/python2.5/site-packages/FormEncode-1.1-py2.5.egg/formencode/api.py',
line 400 in to_python
  value = tp(value, state)
File
'/usr/lib/python2.5/site-packages/FormEncode-1.1-py2.5.egg/formencode/schema.py',
line 153 in _to_python
  new[name] = validator.to_python(value, state)
File
'/usr/lib/python2.5/site-packages/FormEncode-1.1-py2.5.egg/formencode/api.py',
line 403 in to_python
  vp(value, state)
File
'/usr/lib/python2.5/site-packages/FormEncode-1.1-py2.5.egg/formencode/validators.py',
line 1352 in validate_python
  a=DNS.DnsRequest(domain, qtype='mx').req().answers
File 'build/bdist.linux-i686/egg/DNS/Base.py', line 202 in req
File 'build/bdist.linux-i686/egg/DNS/Lib.py', line 461 in addQuestion
File 'build/bdist.linux-i686/egg/DNS/Lib.py', line 128 in addname
UnicodeDecodeError: 'ascii' codec can't decode byte 0x99 in position 0:
ordinal not in range(128)

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