GnuCash can't calculate?!

[Elizabeth Dodd]

On Wed, 20 Jan 2010, Wouter van Marle wrote:
> For privacy reasons of course I can not just post the complete customer
> report here. The difference is not equal to any of the numbers in the
> list (invoices and payments), though it's only $0.08 off of one of them.
> 
I put an invoice here, I took a screenshot, opened it in GIMP and blanked out 
all name and address details.
The resulting jpeg was only a few kb and accepted as a list attachment.