The latest add-on pack for Fallout: New Vegas apparently does not play nice with some save files. Bethesda says they are aware of the error and is working on a fix.
Bethesda released a new trailer and some screens for its upcoming Fallout: New Vegas "Honest Hearts" DLC. It's due May 17 on XBL and Steam, and "on the earliest date possible" on PSN.
"Well it's May 17th... so before midnight tonight I'm sure, depending on the time zone."