I managed to reproduce the "visible tracks" bug too, and I'm working fixing that one now.
As for the preview not selecting anymore, the only reason I changed it was that I found that in energy XT using very small buffer sizes I'd get some clicks because the graphics card was busy updating the gui at the exact same time as the preview was starting to play - I'll see if I can solve that problem in a more elegang fashion.
I'll look at the CTRL instert issue as well
