This changes the game somewhat. BSG expert Chris Pappas informs me that his own copies of the episode from eighties syndication don't have that line audible. This means that only some
of the syndication copies had it, which makes that bit of dialogue extremely rare indeed.
If it turns out it was never there at all, then someone has worked very hard to plant a false memory in my brain. Since I see no point in anyone's doing so, and since I have no family history of insanity, I continue to believe it was there, and if I ever find my old tape I'll prove it.