Query is now defined as follows...

<xs:complexType name="cmisQueryType">
<xs:sequence>
....

<xs:any maxOccurs="unbounded" minOccurs="1" namespace="##other"
processContents="lax" />
</xs:sequence>
<xs:attributeGroup ref="cmis:cmisUndefinedAttribute" />
</xs:complexType>

Which means a foreign element is now required in the cmis query document, but this shouldn't be required. I'm not sure why any foreign markup is required in the query document.