I thought it might be a problem on MOS, but that is referring to the dimension 'Assignment within Government Reporting Entity Fiscal Year to Date' but it seems you aren't using that.
The only other thing i can think of is the upload date - I would normally use the period end date of the period in which the legacy system payroll last ran, whereby you extracted those balances. e.g. if the last pay run on legacy was Jun 2011, then set the upload date to 30-JUN-2011.
@Gav, good try fella but the effective date 01/01/0001 only refers to the Balance Initialization elements/links, not the balances themselves.
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