I've seen some books that have a certain length of characters in all caps (or in bold, or itallics, or some combination) and then stop, even if it is in the middle of a word. A bit of searching through recent reads (I remembered seeing something like that not long ago) turned up this one.
The Accidental Time Machine has the first line of every chapter in bold-- and a few times that means one word is half bold, half not. Look at this example, where it ends up with
Wednes-
day
http://books.google.com/books?id=Z-E...page&q&f=false