I test it with FF and IE 6.01 on a german board. I use charset=iso-8859-1 for my german language page. It worked on my site without problems. Do yue try to clear out the cache of the board and the browser? Close browser and reopen.

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen