mutable-encoding support error

[ntop001]

it always get error on 'gbk' econding ,my solution is as below:

var iconv = new Iconv(response.type.charset, 'UTF-8//TRANSLIT//IGNORE');

add to params '/TRANSLIT//IGNORE', it really works on fetching rss xml, but when it fetching html files and convert it's encode
from 'gbk' to 'utf-8' it got error ,agian , all the 'gbk' character got lost (since i used ignore). Can you fix the problem if you got some
time?

this is my test website:
http://news.163.com/special/00011K6L/rss_newstop.xml