It is MySQL 5.0: http://dev.mysql.com/doc/refman/5.0/en/myodbc-configuration-connection-param...

This page seems to be about some ODBC connector, which I'm sure you are not using?

Oh, I forgot to mention that I'm NOT EVEN USING the mapping :). The error/strange behaviour purely results from creating the mapping:

................catch { ........................mapping(string:int) tst_opt = (["connect_options":2]); ........................dbconn = Sql.Sql( QUERY(db_string)); ................};

I didn't get to the part of actually using the mapping yet.

Strange, strange, strange...

Well, yes, that _is_ weird. :-)