I have no idea what I'm (mis-)remembering, 'cuz if Craig isn't aware of it, it probably never was a thing!
As I mentioned earlier, I've not been able to replicate the 12 hour project file, so I have no idea how a new project just started out that way. But, just for grins I played around with it before dumping it. I found absolutely no data of any sort on any of the tracks, so there wasn't really anything to delete, but I compacted the view as much as possible, so as to see as much of the 12 hours of nothing as possible. I "selected" from around measure 200 all the way to the end on all the tracks. Then I selected "delete special" from the menu. And now when I hit go to end, it stops at measure 200. Crazy, right?
Anyway, thanks for giving this some thought, guys. Let's call it "studio gremlins" and pronounce it solved.
Clark