Writeback - Registering A Zero In A New Cell

I have been digging a little more into Analysis Services and how it stores Writeback data.



The way i see it, everytime a Analysis Services shall writeback data it does a cube UPDATE cell where it takes the difference between the original value and the value that should be stored. The differrence is then stored in the writeback table.



When lets say 1000 is inserted in a new cell, that has no original value, there is nothing to make a difference to. Therefore the stored value will be 1000 in the writeback table.



The problem comes if a user will store Zero in a new cell (Let's say people should register absence from work and types zero for a cetain day). Since there is nothing to calculate a difference from, Analysis Services then decides to ignore that value.



My question is if someone knows a workaround for this or if it's something that Microsoft will solve in a SP