And sometimes things aren't supposed to have intermissions. 1776 isn't supposed to have one (even the Broadway show didn't have one), and West Side Story includes a note in the Criterion Laserdisc where Bob Wise says the film was designed to not have one.
When I was in the booth we would get notes on occasion. I remember one from Redford about the multi-aspect ratios for The Horse Whisperer for example.Usually you'd get a note in the cans when there was something unusual or specific to be done, it was maybe something you saw a few times a year.