OT, but to all of us Fallout fans out there, I just found out about a disasterous bug involving your ability to go back and forth from Big MT and the Mojave Wasteland. Fallout Wiki says:

When Transporting all rep with current factions is reset to neutral

O_O

Also, if you do Old World Blues, then Dead Money, you might have this:

The Big Mountain Transportalponder! may disappear upon leaving the Sierra Madre.

Obsidian, you have some bugs to fix.