Sure. We get that all the time!
Seriously, though, could you be more specific?
Which version of Fallout 2 are you running? Are you using the patch?
What have you done in Broken Hills so far? Have you recruited Marcus? Have you attacked him? Do you have a guess what might have caused the glitch?
Finally, were you able to repeat the bug or was it a one-time incident? What about earlier saves or a new game?