When resizing the chart(the square within the chart area that displays the data 
values and not the title or legend), I noticed that the font in the row names 
and y-axis values changed proportionally to the size of the chart.  I then 
click-dragged the upper left corner of the past the lower right corner.  This 
means that the formerly upper left corner was now actually below and to the 
right of the formerly lower right corner.  After this, the font size would no 
longer change proportionally, but was stuck at 2pt.  To repeat this:
1.) Select the "Insert Chart" option, either from the toolbar or the "Insert" 
pull-down menu.
2.) If the chart is not in Edit mode, right-click it and select "Edit".
3.) Select the chart (the area with the bar graph).
4.) Click and drag the upper left corner and drag it to a point that is below 
and to the right of the (formerly) lower right corner.
5.) Observe the text that makes up the row names and y-axis values.  They 
should now be stuck at 2pt.

Note: When I manually changed the font size to something else, it would then 
start adapting again when I would resize the graph.