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Any tcp experts out there who can help me understand

I am trying to use a package called textpattern to set up a simple web site.

I am struggling because although my windows box with IE can see the formatting, both Firefox and Konqueror
on a linux box ignore it.

I put ethereal on the communications between the browser and the web server, which is generating the css file
via a php script.

What I see is some "TCP DUP ACK" messages, which seem to be saying that there is something wrong with the 
communications.  Since everything else works fine on my little area network this is suprising.

Googling around does not give me any clues as to what is going wrong.  Can any experts tell from the attached 
dump of the key comms why it may be doing this so that I can at least look more closely at it.

No.     Time        Source                Destination           Protocol Info
     17 0.225370    192.168.0.39          192.168.0.21          HTTP     HTTP/1.1 200 OK (text/css)
     18 0.225411    192.168.0.21          192.168.0.39          TCP      34171 > www [ACK] Seq=411 Ack=1449 Win=8736 Len=0 TSV=44065657 TSER=1526114212
     19 0.225491    192.168.0.39          192.168.0.21          HTTP     Continuation or non-HTTP traffic
     20 0.225502    192.168.0.21          192.168.0.39          TCP      34171 > www [ACK] Seq=411 Ack=2897 Win=11632 Len=0 TSV=44065657 TSER=1526114212
     21 0.225875    192.168.0.39          192.168.0.21          HTTP     Continuation or non-HTTP traffic
     22 0.225893    192.168.0.21          192.168.0.39          TCP      34171 > www [ACK] Seq=411 Ack=4345 Win=14528 Len=0 TSV=44065658 TSER=1526114213
     23 0.225999    192.168.0.39          192.168.0.21          HTTP     Continuation or non-HTTP traffic
     24 0.226009    192.168.0.21          192.168.0.39          TCP      34171 > www [ACK] Seq=411 Ack=5793 Win=17424 Len=0 TSV=44065658 TSER=1526114213
     25 0.226128    192.168.0.39          192.168.0.21          HTTP     Continuation or non-HTTP traffic
     26 0.226141    192.168.0.21          192.168.0.39          TCP      [TCP Dup ACK 24#1] 34171 > www [ACK] Seq=411 Ack=5793 Win=17424 Len=0 TSV=44065658 TSER=1526114213 SLE=453407844 SRE=453407956
     27 0.426731    192.168.0.39          192.168.0.21          HTTP     Continuation or non-HTTP traffic
     28 0.426887    192.168.0.21          192.168.0.39          TCP      34171 > www [ACK] Seq=411 Ack=7353 Win=20320 Len=0 TSV=44065859 TSER=1526114414
     29 15.070988   192.168.0.39          192.168.0.21          TCP      www > 34170 [FIN, ACK] Seq=1923 Ack=331 Win=6432 Len=0 TSV=1526129060 TSER=44065504


-- 
Alan Chandler
alan@chandlerfamily.org.uk
First they ignore you, then they laugh at you,
 then they fight you, then you win. --Gandhi
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