Problem with HttpHeader Accept-Language with InternetExplorer

Question

I'm building an web application using Flash at the front side and Jetty at the back side.
This application has to care of the language settings of the browser.
Normally the browser sends with each request the Http-header accept-language in wich the language settings of the browser are reflected.
To check this I wrote a servlet wich echos the request with its headers.
Here is the output for FF:
<code>
>>>TestServlet0<<<
HttpServletRequest.getRequestURI
/Era09Web/TestServlet0
HttpServletRequest.getHeader
Host : localhost:8080
User-Agent : Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.9) Gecko/20100315 Firefox/3.5.9
Accept : text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language : en-gb,de-at;q=0.5
Accept-Encoding : gzip,deflate
Accept-Charset : ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive : 300
Connection : keep-alive
Cache-Control : max-age=0
HttpServletRequest.getLocale: Englisch (Vereinigtes Königreich)
</code>
Here is the output for IE:
<code>
>>>TestServlet0<<<
HttpServletRequest.getRequestURI
/Era09Web/TestServlet0
HttpServletRequest.getHeader
Accept : */*
Accept-Language : en-GB,de-AT;q=0.5
User-Agent : Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; MSN OptimizedIE8;DEDE)
Accept-Encoding : gzip, deflate
Host : localhost:8080
Connection : Keep-Alive
HttpServletRequest.getLocale: Englisch (Vereinigtes Königreich)
</code>
That looks ok, but it was without Flash jet.
Now the same info requested by mx.rpc.http.HTTPService.
First for FF:
<code>
RequestURL : http://localhost:8080/Era09Web/DownServlet
HttpHeader:
Host : localhost:8080
User-Agent : Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1.9) Gecko/20100315 Firefox/3.5.9
Accept : text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language : en-gb,de-at;q=0.5
Accept-Encoding : gzip,deflate
Accept-Charset : ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive : 300
Connection : keep-alive
RequestLocale : Englisch (Vereinigtes Königreich)
</code>
Second for IE:
<code>
RequestURL : http://localhost:8080/Era09Web/DownServlet
HttpHeader:
Accept : */*
Referer : http://localhost:8080/Diagramm1.swf
Accept-Language : de-DE
User-Agent : Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; MSN OptimizedIE8;DEDE)
Accept-Encoding : gzip, deflate
Host : localhost:8080
Connection : Keep-Alive
x-flash-version : 9,0,124,0
RequestLocale : Deutsch (Deutschland)
</code>
Question: Why with IE it shows me de-DE and not en-GB ?

Answer 1

I'm sending the files zipped yes. I thinks it's better like that. Isn't it?
Yes.
They are not necessarly using the same version. I will ask them to get the last one so we will have all the same.
Perhaps that will help. You should also make sure they have the same Arabic fonts on their machines that you used for your file.