Hi Christina, the Pressbooks team is still working to fix some of these issues.
For the images, a quick fix will be to upload the images as JPG instead of PNG. Pressbooks hopes to resolve the error (which has to do with the profile in which the PDF is created) by switching to the PDF-X4 profile for the print PDF exports. This is currently being tested and may be resolved in the next 2 weeks, but the JPG option should give you a more immediate result.
For the footnotes, the main issue, if you don’t mind me getting a bit technical, is the fact that the footnote is treated as a
span element in XHTML and Pressbooks’ Prince PDF export routine. Span is an inline element, which means that it isn’t capable of receiving block element children (such as lists, blockquotes, or multiple paragraphs). The Pressbooks team may be able to resolve this by treating footnotes as
div elements, which are not inline, but this requires a bit more testing. I’m still waiting on an estimation of how long this will take. If we’re not able to wait, I’d suggest working with Ben and the author to see if the footnote can be edited to display without the lists, or perhaps revised to appear in the body text.