Viewing more questions per page (15 > 30 > 50) will cause you to jump past the "end of the book" showing "page not found".
Steps to reproduce:
- View newest questions, page size 15 (link)
- Jump to older-questions page, page size 15 (link)
- Switch to 50 questions per page (link)
Note: A search for this bug turned up an mishmash of closed, migrated, deleted, and [status-completed] posts, so I'm not sure this is documented at all. I tried to clean up and consolidate. Here ya go.