Apple Inc. has posted iPhoto Update 7.1.5, an update for iPhoto that included a rare thing from Apple: Patch notes with actual information. The still-brief patch notes in Software Update in Mac OS X notes, "This update improves the printing quality of books, cards and calendars ordered via the iPhoto printing service."
The update is a 10.9MB download. Apple has also posted a direct download page on its support size, where the download is listed as being a 9MB download.