We currently have a mismash of .SHTML and HTML files on our Intranet which are being crawled and indexed via our SharePoint farm. We have noticed that when doing searches, the HTML files correctly display the contents of the files, but the SHTML files do not. When we type in the name of the SHTML file in question in the search box, the file is returned successfully but we cannot search on the content of the files.
We have verified that .SHTML are valid file types to be scanned and are not being blocked in any way. MIME appears to be ok as well.
There are third party ifilters that support this content, but they are an extension of the MS provided ones and simply provide additional content features.
Thanks for the help!