TCL error message with X-Forwarded-For iRule

We are not using a custom http profile on this VS. Actually all our needs are customized with iRules. There are two iRules which triggers http redirects.

One for recdirecting a group of certain ("foreign") URIs (like facebook.domain.com to facebook.com/domain, e.g.)

when HTTP_REQUEST {
     'root domain redirect'
    if { [HTTP::host] == "mydomain.com" } then {
        HTTP::respond 301 Location http://www.mydomain.com[HTTP::uri]
     }
    elseif { [class match [string tolower [HTTP::uri]] equals REDIRECTS_301_SCO ] } then {
        HTTP::respond 301 Location [class lookup [string tolower [HTTP::uri]] REDIRECTS_301_SCO ]
    }
}

and the other one is quite old and presents some hardlined redirects:

when HTTP_REQUEST {
          if { [HTTP::request] == "http://asia.mydomain.com/taiwan" } {
  HTTP::redirect http://www.mydomain.com/something
             }
          elseif { [HTTP::request] == "http://asia.mydomain.com/hongkong" } {
  HTTP::redirect http://www.mydomain.com/something
             }
          elseif { [HTTP::request] == "http://asia.mydomain.com/china" } {
  HTTP::redirect http://www.mydomain.com/something
             }
          elseif  { [HTTP::host] contains "asia.mydomain.com" } {
  HTTP::redirect http://www.mydomain.com
           }
}

Furthermore we have cookie persistence and a fallback host enabled with an iRule.

Does this help anything?