[GNC] Fancy Date Format in Book Options keeps resetting

[Raghavendra Kamath]

Hi

I am setting up gnucash and when I set Fancy Date Format to `%d-%m-%Y` in business section of book options. it keeps resetting to "No Fancy Date Format" and the date is used from the option set in the preferences.

Am I doing anything wrong? I want this format to appear on the invoices how to achieve this?

Thank you

-- 
Raghavendra Kamath