As part of Sharepoint 2010 implementation for a leading Geo Mapping company in Norway we have set up a separate enterprise search site. We hit upon a problem when trying to apply custom master page for the Search site. When custom master page is applied to the search site, the search box disappears and all we saw was blank screen.
This blog from Randy Drisgill came out our help. We followed the steps and the search center page worked like a charm.