When adding a new constituent in a constituent update batch, users may need to enter addresses with multiple address lines (apartment numbers, PO Boxes, etc.). However, only one address line is able to be entered.
This was resolved in CRM 3.0 Service Pack 14
Steps to Duplicate
Create a new Constituent Update Batch
Enter a new constituent or chose an existing constituent
Select the address collection field
Enter an address line
Select enter in the address field to try and enter a second address line