consolidation with multiple currencies

Has anybody else had problems with consolidation in multiple currencies. We have had Text to Text overflow errors when navision forms the description in the consolidation company. This may be the number of decimal places our client uses but it should not happen. We restrict the output to 4 significant digits when forming the description field. When the balance of an account in the consolidation company is revalued from month to month the equation navision uses is wrong and gives stupid values. Has anybody else had similar problems with consolidation. We have fixed the problems but it is not good that our client finds such problems with standard navision as these.