Unfortunately, you are correct. Reverting to the classic theme solves the problem.
I say 'unfortunately' because my theme is only a slightly modified version of the XP theme. Only sizes are changed; there are no color modifications involved. I rebuilt my theme from scratch and once again the background gui went black. If another of the more than 200 programs I have installed exhibited the same problem, I might be willing to blame MS or (horrors!) even me, but since this is a unique occurrence with jv16 I have to believe there is a programming bug here.
I also tried jv16 2006 & I got the same results.
Thanks for the response; at least now I have a better idea of the problem. I'll check back in 2007 & let you know how things are going. Meanwhile, I guess it's Registry First Aid for now.
Thanks!