My colleague encountered a strange issue with a simple sum:
<colgroup><col></colgroup><tbody>
22.05
-7.05
661.00
-232.00
-20.75
6.20
-427.85
-1.60
Sum:
-3.41949E-14
</tbody>
<colgroup><col></colgroup><tbody>
</tbody>
If you reorder any of these it fixes it to zero sum...