Here's a paragraph of text in a .docx file that I turned into a PB:

Here's what it looks like in Logos (with a certain window width):

Notice that there is plenty of room at the end of the second line for "somebody—" but Logos doesn't put it there. It treats the — as if it were a non-breaking hyphen that must be joined to the word after it. This is not how they should be treated in typesetting. Word does it correctly if I add some garbage to the paragraph to make the second line longer and force it to break earlier:

The .docx file, if you need it, is the same one I posted here: http://community.logos.com/forums/t/79681.aspx