I've observed couple bugs that's happening after upgrading from 1.3.1.

Problem:

1. The online update refuse to acknowledge that the latest firmware has been installed; thus, continue to prompt for update

2. WPA2-Enterprise no longer functions. Selecting that option cause the wifi security to be disabled.

3. Security tab for the wifi credential are now showing the default option: "-Please Select-"

Workaround:
* Downgrade the firmware to the lowest version that's publicly available (which is 1.3.4) AND importing previous backup file.

   * Will fix WPA2-Enterprise issue, but the security tab is still showing unselected status. Importing backup file on the latest version will not resolve the WPA2-Enterprise to be re-enabled.