Attention, users of the MapQuest-hosted Nominatim Search Service! During the next few weeks, we will be making upgrades to the back-end systems that power our instance of Nominatim and this involves a complete data refresh. During this time, OSM data updates will be temporarily suspended. It is possible that users may temporarily experience inconsistent results until all of our back-end servers have received the necessary upgrades. It is also possible that users may not see recent edits to OSM data immediately reflected in search results. Please feel free to tweet us @MapQuestTech or e-mail us at firstname.lastname@example.org to ask questions. We apologize for any inconvenience caused by the temporary suspension of data updates!
UPDATE: As of September 15, 2014, upgrades to our back-end infrastructure have been completed and OSM data updates have resumed.