file: shop/templatetags/currency_filter.py line: 38
... value = Decimal(str(value)) ...
Will throw a ConversionSyntax exception if "value" is equal to u''.
Not sure if this should be made more robust, by checking for the empty string? Is the intended result of such a value, zero by default?
This will result in 'currency' template tag failing, and not properly displaying the correct total amount in your cart.
Reported by markph