404. That’s an error.

The requested URL /bookmarks/mark?op=edit&output=popup&bkmk=http%3A%2F%2Fwww.flyertalk.com%2Fforum%2Funited-airlines-mileageplus%2F1386608-only-fare-classes-available-j-c-y-b.html&title=Only+fare+classes+available+are+J%2C+C%2C+Y+and+B%3F was not found on this server. That’s all we know.