I didn't notice this before but I may not have tried the Search function with this theme I've been using for a few weeks.
I just went back to the author's site and their Search works fine so I grabbed their code which matched exactly what came out of the zip file that I had already tried anyway but I still get a 404 screen.
I have implemented a plugin that searches comments also and that worked great with the other theme but whether I use it now or not, I still get the 404 (it is just activate and use, no code additions).
Can my database be corrupted from a Search table? Just guessing but I don't know what to do. Any help would be greatly appreciated. TIA.