Using FLAG_NO_PROMPT doesn't suppress the dialogs normally handled by SQLDriverConnect. (Bug#30840)

The specified length of the user name and authentication parameters to SQLConnect() were not being honored. (Bug#30774)

The wrong column size was returned for binary data. (Bug#30547)

SQLGetData() will now always return SQL_NO_DATA_FOUND on second call when no data left, even if requested size is 0. (Bug#30520)

SQLGetConnectAttr() did not reflect the connection state correctly. (Bug#14639)

Removed checkbox in setup dialog for FLAG_FIELD_LENGTH (identified as Don't Optimize Column Width within the GUI dialog), which was removed from the driver in 3.51.18.