Formats and reflow!
I've just finished what started off as a query on our history group website and turned into a 13 page article. It's amazing how most images start in the bottom half of a page. A few changes of text edge them closer and closer to the bottom of a page until one then falls off, leaving a big gap and cascading the consequences until the last image on the last page falls off onto a new page all of its own separated from the paragraph that describes ant and absolutely has to be on the same page.