Can't call databasepropertyex() over DBD::ODBC for MSSQL

Hello, I've noticed that DBD::ODBC with unixODBC and FreeTDS has bizarre
problems calling some stored procedures and functions in MSSQL.

Here's an example:

% echo $DBICTEST_MSSQL_DSN
dbi:Sybase:server=SQL2008
% perl -MDBI -le 'my $dbh=DBI->connect(@ENV{map "DBICTEST_MSSQL_$_", qw/DSN USER PASS/}); print for $dbh->selectrow_array("SELECT databasepropertyex(DB_NAME(), '\''Collation'\'')");'
SQL_Latin1_General_CP1_CI_AS

Here I'm using DBD::Sybase compiled against FreeTDS to call the
databasepropertyex() function, it works correctly.

The same query using DBD::ODBC compiled against unixODBC using the same
version of FreeTDS produces:

% echo $DBICTEST_MSSQL_ODBC_DSN 
dbi:ODBC:server=myhost.dyndns.info;port=5000;driver=FreeTDS;tds_version=8.0
% perl -MDBI -le 'my $dbh=DBI->connect(@ENV{map "DBICTEST_MSSQL_ODBC_$_", qw/DSN USER PASS/}); print for $dbh->selectrow_array("SELECT databasepropertyex(DB_NAME(), '\''Collation'\'')");'                                                              

this returns no result.

This is the only reliable way to detect collation (and therefore
case-sensitivity) in MSSQL 2000+ if for some reason access to
sys.databases has been blocked, so would be nice if it worked or there
was some workaround.