Small Squares or Blocks after string in table field
Some checks


Do both your Dev and Prod link to the same Navision DB?
Compare the rows in sys.servers, especially the is_collation_compatible column
Is the linked server via an ODBC/DSN or is it simple "SQL Server"? If ODBC then are settings the same in the DNS?


I suspect number 2 or 3 if the all your servers link to the same box.