ditto on the SQL error.
And a little more info on the error:
Code:
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 'GROUP BY xcart_products.productid ORDER BY xcart_products_categ
Backtrace :
/homepages/35/d117449933/htdocs/include/func.php:110
/homepages/35/d117449933/htdocs/include/func.php:70
/homepages/35/d117449933/htdocs/include/func.php:154
/homepages/35/d117449933/htdocs/include/func.php:1985
/homepages/35/d117449933/htdocs/modules/Bestsellers/bestsellers.php:96
/homepages/35/d117449933/htdocs/home.php:59