v1.3.8a incorrect display of tax

Hello,

Not sure if this is the right thread but here goes;

I have been living with the incorrect display of tax until I have more time to look at it, in the knowledge that the total paid by the customer is correct.

Then I recieved this order tonight, any ideas?

Sub-Total: £54.98
Zone Rates (Shipping to GB): £0.00
Discount Coupon: a788965763 : -£11.49
: £6.70
Gift Certificates: -£25.00
Total: £33.26

Site is www.mightcontainnuts.com

Version 1.3.8a

Any help much appreciated.....:shocking:

Many changes were made in v1.3.9 to address some minor anomalies.
Have you tested the same scenario in the newer version?