Hi,
There are no way to remove this field from the output, or at least none that I've found. The MSDN documentation says that even if you set the IncludeMandatoryColumns to false, it will returns some mandatory fields.
I think your best option here is to fill a bug report to Microsoft, saying that invalid characters are put inside the ows_MetaInfo field.
Another thing you can try, but I don't know if it will resolve the problem it setting the Properties attribute of the ViewFields element to TRUE.
<ViewFields Properties="TRUE">your fieldrefs</ViewFields>
OmaR
2010-03-09 10:06:19