Daleks and UFO - "Letterbox"?

[NewYorkGuy]

The definition of "letterbox" appears to be getting stretched. Last night's "Daleks' Invasion Earth 2150 A.D." started out in true letterbox format, but as soon as the opening credits ended the picture changed to what appeared to be the 16 x 9 format to fit a flat-panel TV. I get that, by contract, some studios don't want TCM showing the original theatrical format, but to continue to call what happened to "Daleks" is somewhat misleading.

 

And then "UFO" was billed as letterbox but the opening credits were in a 4 x 3 format that then also seemed to switch to 16 x 9.

 

Aliens have taken over the definition of English words...???