Sudden Single Spacing

[Bruce Pourciau]

I'm writing a paper in the Elsevier class, with the option "review,"  
which produces extra space between lines, suitable for a manuscript  
submitted to a journal for review. But right in the middle of the  
document, the text suddenly becomes single spaced for a couple of  
paragraphs. In the source, the only odd thing I see is the comment, %  
Preview source code for paragraph 85, which appears just before the  
sudden single spacing begins.

Any thoughts?
Bruce