Install Adobe Reader X on a Windows 2003 machine with Indexing Service installed. Create a catalog (folder) and point indexing service at it so that documents are indexed. Verify indexing is working with a simple text file. New copy a pdf file into the folder. You will see in Computer Management the file appear to be indexed. Now simply query the catalog - the file contents are not indexed. The iFilter that gets installed should allow indexing service to index pdf file contents and return search results when the catalog is queried.