flow-capture and flow-fanout don't work with NetFlow v9

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What steps will reproduce the problem?

1. Let a flow-capture or flow-fanout instance listen on a specific IP/port
2. Configure a Cisco router to send NetFlow v9 data to this IP/port


What is the expected output? What do you see instead?
 - flow-capture: Nothing is captured and saved into the file
 - flow-fanout: No NetFlow packets are sent to the defined targets


What version of the product are you using? On what operating system?
 - flow-tools version 0.68
 - Used on Ubuntu 10.04 32Bit


Logfile entries which occur repeatedly:
 - flow-capture[27707]: ftpdu_verify(): src_ip=XX.XX.XX.XX failed.
 - flow-fanout[2177]: ftpdu_verify(): src_ip=XX.XX.XX.XX failed.

Original issue reported on code.google.com by pascal.u...@googlemail.com on 4 Oct 2010 at 10:23