DrByte,

Just went into the shipping module in admin and this is showing:

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '//IETF//DTD HTML 2.0//EN"> in:
[update configuration set configuration_value = "
Not Acceptable

An appropriate representation of the requested resource /postage.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
" where configuration_key = "MODULE_SHIPPING_OZPOST_EXPIRE"]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

Would this be causing the issue?