Memory Refresher: Network Problem Over "X" Miles

I seem to remember reading a story a while back about someone who got a trouble report that the users couldn't access sites greater than "X" miles away (can't remember X but it was like 100 or 200 or something). Anyhow, tech initially disbelieves story, but sees it for himself, and really odd network problem is diagnosed, problem solved.

However, I can't find this story to save my life now. Can anyone refresh my memory on it?

Cheers,
D

[sorry if this got sent twice... it doesn't appear to have gone out the first time, probably because it had an S/MIME signature attachment?]

http://groups.google.com/group/it.fan.marco-ditri/msg/623f793d1cb0dd51