The horizontal scrollbar stops paging across (clicking in the scrollbar gutter)
when a cell is more than two pages wide.  

1. Download the example csv file from:

      http://www.agitate.org.uk/download/report.csv

and open it in the OO Spreadsheet application.

2. Click in the gutter to scroll to the right.  

Note that the second column is very wide because of the very long contents and
the application will not scroll once it hits that cell, either right or left. 
Using the arrow buttons on the scrollbar does allow you to scroll still.

You can stop the application from producing this behaviour by shrinking the very
large second column so that it is less than twice the width of the applications
window (or spreadsheet area of the window).  Resizing the big column can be
difficult, so if you right mouse click on the column header and select optimal
width, it is easier.