The converted tables look OK in a read-only sense.  But you can't really edit 
the table (as we need to do to update the contents over time).

Here are a list of the problems that make OpenOffice.org tables unusable:
* There is no way to change the color of the background of a cell.
* There is no way to resize a row or column to make room for more or less text.
* Cells do not automatically adjust in size as I add/delete text.
* I cannot add text to an empty cell.

I have an example I can send if this would help