The insert() method in "Cart" class doesn't suport UTF-8 in products names
Possible solution change line 31 of cart class to
var $product_name_rules = '.:-_ a-z0-9áéíóúÁÉÍÓÚàèìòùÀÈÌÒÙ'; // alpha-numeric, dashes, underscores, colons or periods
reply has been addressed here
Duplicate of #78.
Changed server check to ensure SCRIPT_NAME is defined. Fixes #57