Contact Addresses With Two Lines

I have numerous addresses in my Contact Address Book that have two lines in the street address. When entering new people within my Address Book, I can type the first address line, hit return, and then type a second address line . . . all's fine.

But I also add new contacts to my Address Book from my database. Prior to Mountain Lion, I would import my contacts that had a two line street address as though it was one line, placing the characters \n where the line break was to appear (so the import would initially look like this: 2112 River Oaks Court\nBuilding 3, Suite 114 I could then export my entire address book as a vCard, re-import the whole thing, and Address Book would automatically replace the \n with a line break. So my final address in Address Book would appear like this (as though I typed it in manually using a return):

2112 River Oaks Court

Building 3, Suite 114

Something has changed in Mountain Lion. When I export all my addresses as a vCard, reimport them, the \n is not triggering a line break. The first line of my address still looks like this: 2112 River Oaks Court\nBuilding 3, Suite 114

Is there another set of characters that will trigger a line break when importing a vCard?

Steve