404. That’s an error.

The requested URL /catalog/product_compare/add/product/2469/uenc/aHR0cDovL3d3dy5sZW9uc2FmZXR5cHJvZHVjdHMuY29tL3N1cnZlaWxsYW5jZS92aWRlby1yZWNvcmRpbmcuaHRtbA,,/form_key/rcgt6LmTzfm9yxbo/ was not found on this server. That’s all we know.