SEVERAL modifications.  The most significant is correction for multiple attributes
The function return_attribute_combinations in
admin/includes/functions/general.php file was corrected to function properly
in conjunction with the correction in the
admin/products_with_attribute_stock.php to properly call the function.
Other changes were made to minimize the amount of changes needed when
upgrading to the next version of ZC.  Functionality change has been minimal
if at all in this revision.  The idea being to simplify the differences
between the older and newer versions, which will also simplify support
when it is needed to be given.