404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Fubuntuguide.org%2Fwiki%2FUbuntu%3ALucid_it&title=Lucid+it was not found on this server. That’s all we know.
/bookmarks/mark?op=add&bkmk=http%3A%2F%2Fubuntuguide.org%2Fwiki%2FUbuntu%3ALucid_it&title=Lucid+it