Production Error at the Art Show

Just got back from the Annual Photography Show here. Over the years they've added major categories - from Color Prints to Special Effects to Digital - and this year the Digital entries were on a DVD show. The voiceover narration introduced each category (People, Landscapes, etc) and then told us about the winning entries.

One of the categories is "Inanimate Objects". The narrator told us

This used to be what we call "Still Lifes".

An interesting position-swap error, that - "used to be" for "is" and "call" for "used to call".

Even more interesting, I didn't even notice it, though my father did. He drew my attention to it. I wonder how many people vetted that without noticing it?