Thanks for the help, but there is no such text box. I deleted it when I created my own title in another box. I deleted the plist preferences for iDVD, and, by highlighting the theme in the right hand window and applying a reset in a pull down window, I eliminated the "Revolution Main" rotating text. In fact all I got was a series of vertical bars rotating where the text used to be. Figuring I had at least a partial victory, I tried to burn a DVD of the slideshow - no dice. So I reverted to the old "Revolution Main" text and successfully burned a DVD.
Case closed for now. I'll take up the battle again at a later date.
Again, many thanks.