Font.hasGlyphs and line breaks not working

Hi everybody,

I have a function for checking whether the embedded font has all the glyphs available, it looks like this:

public static function hasEmbeddedAllGlyphs(string:String, fontName:String):Boolean {

            var availableFonts:Array = Font.enumerateFonts();

            for(var i:uint=0; i<availableFonts.length; i++) {

                if(availableFonts.fontName == fontName) {

                    return availableFonts.hasGlyphs(string);

                    break;

                }

            }

            return false;

        }

Now this works flawlessy if I call it with this:

var s:String = "line 1 line 2";

trace(FontUtil.hasEmbeddedAllGlyphs(s, FontUtil.EMBEDDED_FONT_1)); // returns true

However if I add a linebreak into the string, it stops working:

var s:String = "line 1 \n line 2";

trace(FontUtil.hasEmbeddedAllGlyphs(s, FontUtil.EMBEDDED_FONT_1)); // returns false!

What the... why exactly is this so and does anybody know a workaround? I am using this  call in another static method which sets the text depending on the available font and therefore I cannot split the string.

Thank you!