A simple document with image in header that extends .5 inches outside of left 
and right margins of the document does not render the same as WORD.  The image 
is not stretched out past the left margein.  It ends up .5 inches to the left 
of the right margin. 

Example, the left and right margins are set 1 inch from the side of the paper. 
On the document the first line indent, the hanging indent and the lert indent 
are all set to the left margin. THe right indent is set to the right margin. 
For the Header Footer, the first line indent has been moved to 1/2 inch to the 
left of the left margin and the right indent is moved 1/2 inch to the right of 
the right margin. Insert and image into the header and have it stretched to the 
first line indent of the header and the right indent.  This was set up in 
Microsoft Word.  When it is opened in Open Office, the image start at the First 
line indent of the header but the right side is 1 inch for the right indent of 
the header.  In Word it goes to the right indent.