Its been noticed that when users search for documents they see incorrect Author in the search results on a SharePoint 2010 site.
Example: Author is set as ABC in the metadata of the documents, however they get the Author in the search results as XYZ.
Registry Key value of "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\14.0\Search\Global\Gathering Manager\EnableAuthorOverride" is set to 1. Thereby it was taking Author automatically based on content in the document.
1.       On all the SharePoint Crawl Component Servers in the farm.
Restart the SharePoint Server Search 2010 windows service from the command prompt using following commands. However, ensure that all crawls are idle during this time.
3.       Post completion of the full crawl, we should now see correct Author Name in the search results.
Warning: Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Its strongly suggested to have the keys backed up before the values are modified.