Sorry to jump into your thread, but hey, free bump back up to the top!

I'm having the same problem but trying to use IBM850 character set. On a normal page, I send the following line in the header information (i.e. before the html tag):
Content-type: text/html; charset=IBM850

I can't do this when using Javascripts window.open. Firefox shows the encoding of a javascript popup window to be UTF-8. I've already...