Database is 220.127.116.11, character set WE8MSWIN1252, NCHAR character set AL16UTF16. The table in question contains two XMLTYPE columns.
In the .110 beta, a query such as select * from mytable returns the error:
"XMLTYPE columns with binary storage must be cast to CLOB using .GetClobVal() or XMLSerialize."
Data from this same table can be viewed through the Schema Browser data tab without error. Both the query and data tab work as expected in Toad 18.104.22.168.