I have never used 1.3.....
If you get a chance come byhttp://www.sermonindex.net/search.php and test a query for that page :)
I have never used 1.3.....
I don't have 1.3, so I really don't know about that - it looks like it was set up a different way back then.
so I believe the only problem is that the search parameter(s) are not being passed to search.php properly...
http://www.sermonindex.net/search.php/search?q=anything
http://www.sermonindex.net/search.php?results=action&query=[SEARCH]
The toolbar always replaces [SEARCH] with the keywords in the search box.