I think that the problem would be somewhat ameliorated if there were a DNS cache on the laptop itself. It would still use DNS servers, but if it got a different IP number for the same address, it should notify someone.
Win2k and WinXP have a cache for the resolver. To show it, type 'ipconfig /displaydns' in a command prompt. To clear it (which is a good troubleshooting tactic) us 'ipconfig /flushdns'
K
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