billing address on order confirm now screwed up

[cxixer]

I'm not sure what I did, but now when going through the checkout process, everything seems to be in working order except when you get to the order confirmation page, the billing address says:

 

Warning: htmlspecialchars() expects parameter 1 to be string, array given in shop/includes/functions/general.php on line 42

 

 

 

Line 42 is a bracket in my general.php, I'm not sure what to do here. Any help is appreciated!

[cxixer]

oops, line 42 is as follows:

 

return htmlspecialchars($string);

[cxixer]

oops, line 42 is as follows:

 

return htmlspecialchars($string);

 

 

 

ok.. now by changing the billing address in the customer's settings, it's fixed, looks normal. but how can I prevent this from happening to a real customer?