I'd like to point out that the new address isn't being 
   exported yet, at least not to our nameserver:

   > Server:  wipux2.wifo.uni-mannheim.de
   Address:  134.155.59.2

   Non-authoritative answer:
   ~~~~~~~~~~~~~~~~~~~~~~~~~
   Name:    sun-lamp.cs.berkeley.edu
   Address:  128.32.138.88
   Aliases:  ftp.netbsd.org

That indicates that your name server has a cached entry for it that
hasn't yet timed out.