When calculating due dates and fine amounts it appears that in 3.8.1 Koha is ignoring the calendar and making things due on days the library is closed and charging fines for closed days even if the settings say not to.
I don't know if this is related but grace periods are also being ignored.
Is this the same as Bug 8110? Or two different problems?
*** This bug has been marked as a duplicate of bug 8110 ***