I've been using LyX running on Ubuntu to produce a book using the LyXBook layout from the Editorium. I've set a custom paper format of 9x6 inches in Document>Settings>Page Layout. Previously, this has ouptut to pdf using Xetex no problem. Suddenly, however, the resulting pdf is outputting to US Letter. I've checked and double-checked the relevant settings, but everything looks the way it should (I think). Has anyone encountered a problem like this before?
Thanks!