I think most of the original "gold foil" was perforated paper backed aluminum foil. That's why they are called "foil pickups". It was rarely any type...
Now, do you mean that the strings don't return to being in tune after you use the tremolo, or that when you are touching the tremolo, your strings go...
One thing about her is that she's constantly reinventing herself, her sound, and her image. You can love one album, and then really have no reaction...
Well that's a shame. It's a great design, but unfortunately it looks like people don't agree. There's also just a TON of competition in the set neck...