Question on query syntax

[Lance Lance]

Are there any known bugs in the syntax parser? We're using lucene-2.2.0 and
Solr 1.2.
 
We have documents with searchable text and a field 'collection'.
 
This query works as expected, finding everything except for collections
'pile1' and 'pile2'.
 
    text -(collection:pile1 OR collection:pile2)
 
When we apply De Morgan's Law, we get 0 records:
 
    text (-collection:pile1 AND -collection:pile2)
 
This should return all records, but it returns nothing:
 
    text (-collection:pile1 OR -collection:pile2)
 
Thanks,
 
Lance