I just started playing with Calibre to convert some of my PDFs for reading on my iPhone using Stanza. It works great, but I have one very large complaint. Calibre is putting a page break at the bottom of each actual PDF page. This is not convenient by any means. While doing this, it counts each page as a chapter and, as a result, it doesn't try to create a table of contents. I cannot skip from chapter to chapter using the TOC menu, and since each PDF page is only about 3 "Stanza pages" long I can't use the slider to navigate the book.