If assign a value using a percent mask the value isn't displayed as it should - assign a value of 0.08 I expect the control to display "8.00 %", instead it displays "0.08 %"
Changing it now would render all implementations of the current version useless. We have a lot of these lying around and are quite happy the way they are. We just have to remember dividing by 100 if we do math with the values (which we never have to do).