Kudose,
I think my problem lies with how the server is parsing php pages. It is only giving them one run through so it isn't seeing the nested SSI. If there are nested SSI's on the html pages, it works fine because we added .ssi as a server parsable extension in Apache. So, the nested SSI's work fine on the html pages, but on the php pages like our index.php page, it parses the original SSI, but not the SSI nested within. Any ideas guys, or will changing them all to shtml extensions fix the problem, and if so why?