Problem with VAT when using Discount Coupons

[Stevis2002]

Hi all,

Please can anybody help me with this weird problem.
I am using ZC 1.51, with all plugins up to date.

When I use a coupon against an order the vat is worked out wrong eg...


Sub-Total: £32.40
Zone Rates (Shipping to GB): £3.30
Discount Coupon: xxxxxx : -£3.24
VAT @20%: £5.41
Total: £32.46

Admin Order Total values are:--

Discount Coupon:

Include Shipping : False
Include Tax: False
Re-Calculate Tax: Standard
Tax Class: VAT Taxable Goods

[Stevis2002]

Anybody?