Firmware 2.07NA for version B1 units contains two bugs:
1 - An underscore in the Device Name causes a cryptic "37" error to appear when attempting to save any changes to the network settings. Version 2.03 allowed the underscore character. Other invalid characters, such as a "-", generate a more meaningful "Device name given is invalid" message.
Removing any underscores eliminates the error and allows settings to be saved.
2 - The upgrade breaks SharePort communications; the SharePort client utility cannot see the USB port on the device after upgrading from 2.03 to 2.07. This occurs with the latest 3.1.0 R 1 Utility (SXUPTP Driver: 3.4.6.0).
Downgrading back to 2.03 is a workaround.