can't query on UUID field

[hmmbug]

Hi, I'm unable to search on a UUIDField. Is this by design? (or am I just stupid and doing it wrong?!) I couldn't see any examples in the docs or from google search). You help is appreciated. Thanks.

in schema.xml (field "entryid" is defined as a solr.UUIDField):
<field name="entryid" type="uuid" indexed="true" stored="true" multiValued="false" required="true"/>
(this field in my config is also the uniqueKey)

running a simple "entryid:018596d0-2077-4089-a676-b8cfc72b76b1" query from the solr web admin interface returns the correct doc.

in python:

r=si.query(entryid='018596d0-2077-4089-a676-b8cfc72b76b1').execute()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/sunburnt.py", line 219, in query
    return q.query(*args, **kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 387, in query
    newself.query_obj.add(args, kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 296, in add
    self.add_exact(field_name, v, terms_or_phrases)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 320, in add_exact
    this_term_or_phrase = term_or_phrase or self.term_or_phrase(inst.value)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 347, in term_or_phrase
    return 'terms' if self.default_term_re.match(arg) else 'phrases'
TypeError: expected string or buffer

also tried as a python UUID:

r=si.query(entryid=uuid.UUID('018596d0-2077-4089-a676-b8cfc72b76b1')).execute()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/sunburnt.py", line 219, in query
    return q.query(*args, **kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 387, in query
    newself.query_obj.add(args, kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 296, in add
    self.add_exact(field_name, v, terms_or_phrases)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 320, in add_exact
    this_term_or_phrase = term_or_phrase or self.term_or_phrase(inst.value)
  File "/usr/local/lib/python2.6/dist-packages/sunburnt/search.py", line 347, in term_or_phrase
    return 'terms' if self.default_term_re.match(arg) else 'phrases'
TypeError: expected string or buffer