range does not support non-integer steps

The XForms recommendation states that the range control may be bound to the following data types: xsd:duration, xsd:date, xsd:time, xsd:dateTime, xsd:gYearMonth, xsd:gYear, xsd:gMonthDay, xsd:gDay, xsd:gMonth, xsd:float, xsd:decimal, xsd:double [1]

formsPlayer's range control currently only works correctly with integer steps. The attached document contains a range bound to xsd:double that demonstrates this problem.

[1] http://www.w3.org/TR/xforms/slice8.html#ui-range