Bill Boletta:

>I know that most of you on this list must know how utterly frustrating
>it can be to have a familiar melody running through your head and not
>be able to place it.

It the first theme (after the short slow introduction) of the first
movement of Schubert's Symphony No.  5 and it's in B flat.

And yes I know what you mean by being frustrated this way.  Hope this
helps.

Scott Morrison