i set the camera on a tripod and compared the optical viewfinder with the camera's viewfinder (using posters on my bedroom wall), and the camera's entire frame is dead on perfect size. i will be using the camera's viewfinder now, and possibly use the optical viewfinder with my hand to scout shots (since it looks more realistic)
if you want to use the entire camera's viewfinder with the 50mm, you have to place your eye dead in the center (for infinity shots) so there's an even margin between the 65mm frame lines and the edge of the viewfinder. since the 65mm framelines move down and to the right for close focus you have to move your eye slightly to the top left to make those margins even and have the 65mm lines in the center of the frame. doing this makes the image bang on to what the framelines in the optical viewfinder suggest, for both infinity and close focus.
it makes sense to me that you have to move your eye, adjusting depending on where the framelines are, instead of always having your eye smack in the center... you have to adjust for parallax with the framelines AND your eye, this may be why people always think their rangefinders are out of alignment just to hear back from the shop that it's perfectly fine. if they didn't have their eye in the right position shooting at closer distances, then they would be chopping feet off in full body portraits (especially with longer lenses)
am i making sense?