Here's the structure of the problem table (which usually begins with 
'N E W S   H E A D L I N E S'). 
This table is width 100%; two rows; three columns;
The first row: widths 15, 125, 15 ... The second row: widths 15, 100%, 15
|  |  |  | 
|  | that |  | 
Here's the first row in a table on its own. This table is width 100%; one rows; three columns; This row: widths 15, 125, 15
|  |  |  | 
Here's the second row in a table on its own. This table is width 100%; one rows; three columns; This row: widths 15, 100%, 15
|  | that |  | 
Note that in Nav4.x, the middle column gets the width of the maximum width cell in the column; on 5.0, the middle column gets the opposite treatment.