SharePoint Server 2010 hotfix package (Filterpack-x-none.msp), KB2124512
SharePoint Server 2010 hotfix package (Filterpack-x-none.msp), KB2124512 Patch for SharePoint Server search filters This are the issues that:
You crawl a Microsoft Office Excel 2003 document that contains double-byte character set (DBCS) characters, such as phonetic data, in Microsoft SharePoint Server 2010. In this situation, several unspecified strings are not indexed. Therefore, you cannot search these strings.
You have an Office Excel 2003 document. The header or the footer contains DBCS characters. When you crawl the document in SharePoint Server 2010, the strings in the header, the footer, and certain numeric values are not indexed.