nocat errors "uninitialized value" & Bad mac address `none'

[DSL]---[AW1]~~~[AW4]~~~[client 2]
           ~
           ~
       [client 1]

AW1 is a dual homed wireless box running pebble w/ nocat in open mode, 
AW4 is also a dual homed wireless box, running redhat. Client 1 gets 
redirected by nocat and can hit login and all is good. Client 2 gets 
redirected as well, but when they hit login, the user says nothing 
happens, the splash screen stays there. Looking at the status page, it 
shows Client 2 there, but the MAC address field is blank.

Here's the relevant bits from the nocat.log (AW1 = 10.88.1.1, Client2 = 
10.88.4.125) Any ideas?

Thanks!
Drew

[2005-09-06 17:59:04] Spawning child process 20803.
[2005-09-06 17:59:04] Connection to 10.88.1.1 from 10.88.4.125
[2005-09-06 17:59:04] Peer  10.88.4.125  requests 10.88.1.1
[2005-09-06 17:59:04] Opening portal for 10.88.4.125 to 
http://news.google.com/
[2005-09-06 17:59:04] Use of uninitialized value in hash element at 
/usr/local/nocat/bin/../lib/NoCat/Gateway.pm line 366.
[2005-09-06 17:59:04] User () v. trusted (Any)
iptables v1.2.6a: Bad mac address `none'
Try `iptables -h' or 'iptables --help' for more information.
[2005-09-06 17:59:04] User    permitted in class Public
[2005-09-06 17:59:04] Use of uninitialized value in chomp at 
/usr/local/nocat/bin/../lib/NoCat.pm line 223.
[2005-09-06 17:59:04] Use of uninitialized value in join or string at 
/usr/local/nocat/bin/../lib/NoCat.pm line 226.
[2005-09-06 17:59:04] Notifying parent of Permit on peer
[2005-09-06 17:59:04] Use of uninitialized value in join or string at 
/usr/local/nocat/bin/../lib/NoCat.pm line 148.
[2005-09-06 17:59:04] Use of uninitialized value in chomp at 
/usr/local/nocat/bin/../lib/NoCat.pm line 223.
[2005-09-06 17:59:04] Use of uninitialized value in join or string at 
/usr/local/nocat/bin/../lib/NoCat.pm line 226.
[2005-09-06 17:59:04] Got notification Permit of peer
[2005-09-06 17:59:04] Use of uninitialized value in hash element at 
/usr/local/nocat/bin/../lib/NoCat/Gateway.pm line 366.
[2005-09-06 17:59:04] Child process returned 1
[2005-09-06 17:59:04] Spawning child process 20809.
[2005-09-06 17:59:04] Connection to 10.88.1.1 from 10.88.4.125
[2005-09-06 17:59:04] Peer  10.88.4.125  requests news.google.com
[2005-09-06 17:59:04] Capturing peer 10.88.4.125
[2005-09-06 17:59:04] Spawning child process 20810.
[2005-09-06 17:59:04] Connection to 10.88.1.1 from 10.88.4.125
[2005-09-06 17:59:04] Peer  10.88.4.125  requests 10.88.1.1
[2005-09-06 17:59:04] Displaying splash page to peer 10.88.4.125
[2005-09-06 17:59:04] Spawning child process 20814.
[2005-09-06 17:59:05] Spawning child process 20815.
[2005-09-06 17:59:05] Connection to 10.88.1.1 from 10.88.4.125
[2005-09-06 17:59:05] Peer  10.88.4.125  requests 10.88.1.1
[2005-09-06 17:59:05] Attempting to serve 
/usr/local/nocat/htdocs//images/login.gif
[2005-09-06 17:59:05] Connection to 10.88.1.1 from 10.88.4.125
[2005-09-06 17:59:05] Peer  10.88.4.125  requests 10.88.1.1
[2005-09-06 17:59:05] Attempting to serve 
/usr/local/nocat/htdocs//images/auth_logo.gif

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