Facing pages not properly aligned
In the proof copies I’ve purchased recently, the facing page spreads are not properly aligned. Some are correct, while on others the verso and recto pages are off, usually by about ½ a line (5-6 points), but sometimes by an entire line. This varies from one printing to another. For instance, in the most recent proof, the running head and the first line of text on p. 81 are a half a line lower than the same elements on p. 80; in the previous proof p. 81 is an entire line lower. In the previous proof p. 7 is one line higher than p. 6, while in the most recent one p. 7 is half a line lower than p. 6. I have double-checked the InDesign file from which the PDFs are generated and everything is fine (nothing changed on the master pages for a long time, in fact).
I know that Lulu says some slight variations in
manufacturing are permissible. Does this
include the vertical differences I am encountering? Differences of a half line or less might be
tolerable, but when the facing pages are off by an entire line it’s really
noticeable and I think we should expect better.