404. That’s an error.

The requested URL /catalog/product_compare/add/product/3360/uenc/aHR0cDovL3d3dy50aHJvd21lYXBpbGxvdy5jb20vdXBob2xzdGVyeS9hcm0tc3R5bGVzLmh0bWw,/ was not found on this server. That’s all we know.