The style task in v0.85 validates the input and stylesheet XML; previous version (in particular 0.85rc3) did not. This creates a problem because many of the XML files I transform declare namespaces for which I do not have schemas.
This patch against v0.85 adds a validate attribute to the style task. When validate="false" the XML is not validated. The default is "true" so that existing NAnt 0.85 scripts retain their current behavior.