User Defined fields; Transaction Type, changing 'Type' may cause runtime errors.

If changing the 'Type' of a Transaction type Userdefined field may result in a Type mismatch error when drilling down to an existing invoice.

If you have a Transaction Type user defined field in use with no 'Type' specified, then at a later stage change the 'Type' to Currency drilling down to an existing invoice may result in a type mismatch run time error.