That's a very useful link to a very revealing article!
An outdated network router may not function correctly when you use it together with new networking features in Windows Vista
Typical MS insisting that it's the rest of the world that's doing it wrong. Just looking at the number of hits in google for "DHCP BROADCAST flag" suggests that "outdated" to MS = "mainstream" for everyone else.
Such breathtaking arrogance never ceases to amaze.
SD