MyBB Community Forums

after upgrade to mybb 1,2
if i keep utf-8 charset in my language file:
-i can read the forum title,descriptions which set in admin cpanel
but... all the text of threads and posts go wrong!

i switch back the charset to iso-8859-1
can read the threads and posts but the forum titles and descriptions...

help me everyone.Which charset i must choose now and how to fix my problem?
T H A N K S

If it works with iso-8859-1 you don't need to change it.

if i use iso-8859-1,i can't add forum title and descriptions,because the texts go wrong?
any ideas thanks