I was working with Advance search and wondering that Created By is not yielding any search results. After searching I found this information from one blog site.
Its also advised to use “Author” property instead of “Created By”.
Some one posted saying that its solved in SP2, and in some blog sites its mentioned mapping against office(4), I have not tried these approaches. I’ll update once its solved.
It work like charm, just update the “Created By” property with the Office(4) mapping, and don’t forget to do at least an incremental crawl.