If you have a situation where you need to use foreign characters with sIFR in your web pages, here’s a tip to get them to display properly. (This assumes that the font/s you want to use actually have these characters. Check in with your Character Map in Windows or the Character Palette for OSX.)
Edit the Flash file that comes with sIFR: double click then click again to select the text box. In the Properties panel click on ‘Character…” and change the selection to ‘All characters’. Export your swf.
Head over to Tony Franks’ website and pick which character you need to display e.g. an o’umlaut Ö ö which is: Ö and ö.
Then edit your html file inserting the codes for the characters where you need them to be. If all goes well you should see your foreign characters.