Shipping Address Country Empty error

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Ive already used this fix page in the past, im on 1.3.7 and just maybe thats why my site is getting problems since that change Zen is posting 1.3.8?
I have had two missed order using paypal & the errors are;
[FONT=Times New Roman, Times, serif] Response: array (
'TIMESTAMP' => '2009-01-15T18:08:09Z',
'CORRELATIONID' => '161aa2568a69d',
'ACK' => 'Failure',
'VERSION' => '2.3',
'BUILD' => '801690',
'L_ERRORCODE0' => '10731',
'L_SHORTMESSAGE0' => 'Shipping Address Country Empty',
'L_LONGMESSAGE0' => 'The field Shipping Address Country is required',
'L_SEVERITYCODE0' => 'Error',[/FONT]

Reading the error code, (is there a list of these somewhere?) and the empty field, where does the problem lie.
[FONT=Times New Roman, Times, serif] 'SHIPTOSTATE' => '',
'SHIPTOZIP' => 'BN65 33J',
'SHIPTOCOUNTRY' => '',[/FONT]
The country field and state on this one was blank, but surely if the customer fields are *required how is it customers can avoid adding such important parts of addresses like the COUNTRY & a telephone number!
The previous entry was as follows;
[FONT=Times New Roman, Times, serif] [ship_city] => romey
[ship_state] => [/FONT]
[FONT=Times New Roman, Times, serif] [ship_postal_code] => so91 77q
[ship_country_name] => United Kingdom[/FONT]
This one did NOT have United Kingdom missing but same error. State field empty though.

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This topic had also been raised in this other thread, although its stopped before a definative answer seemed to have been posted.
I have now linked each to each other.

http://www.zen-cart.com/forum/showpost.php?p=670720

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If you are having problems with this one go to this thread where its shows how to solve the issue.

http://www.zen-cart.com/forum/showth...386#post504386