stream profile - set title browser

That global variable was just there as an example of selectively removing the Accept-Encoding header if you knew you were going to rewrite the response. In your case, it doesn't seem like you can determine this from the request. So can you try this example which removes the header from every request?

 
 when HTTP_REQUEST {   
    if { [HTTP::header exists "Accept-Encoding"] } {  
        Remove the Accept-Encoding header from the request 
       HTTP::header remove "Accept-Encoding" 
    }  
 }   
 when HTTP_RESPONSE {  
     STREAM::disable  
    if { [HTTP::header value Content-Type] contains "text" }{  
       switch [IP::server_addr] {  
          "x.x.x.nn" { set nvip "thisname_nn" }  
          "x.x.x.uu" { set nvip "thisname_uu" }  
          default { set nvip [IP::server_addr] }  
        }  
  
       STREAM::expression "@<\[Tt\]\[Ii\]\[Tt\]\[Ll\]\[Ee\]>@$nvip @"  
        Active "stream profile"  
       STREAM::enable  
    }  
 }  
 when STREAM_MATCHED {  
       log local0. "<\[Tt\]\[Ii\]\[Tt\]\[Ll\]\[Ee\]>: matched: [STREAM::match], replaced with: $nvip "  
 } 
 

Thanks,

Aaron