After Bethesda have announced that the PC Mod tools have been released for Fallout: New Vegas (Here). Bethesda Softworks' vice president of marketing and PR has also released a statement saying that they are aware of some bugs and issues in the game and are working to get a Patch Fix out as quick as possible. It was to be expected really as Bethesda's engine was known for its bugs and glitches.
We are currently working on releasing patches and updates as quickly as possible for Fallout: New Vegas for all platforms. Announcements regarding the patches are forthcoming.