lyrics running wider than the staff

[Michael Haynie]

Greetings:

Since I've moved to 2.8 from 2.2, I've been having trouble with the 
lyrics -- the last word (syllable) of the last measure of a line 
frequently runs out into the right margin.  At best, it's ugly.  At the 
worst, the word is cut off when I print.  I've searched the docs and 
the archives, but I can't seem to guess the right keywords.

Is there some flag or variable I should set to get Lilypond to consider 
the width of the lyrics attached to notes of the melody when placing 
notes and breaking lines?

Thanks.