lucy24 - 4:18 pm on Apr 18, 2011 (gmt 0)
I was going to say:
Your text was entered in UTF-8, with the two letters ü = C3BC and ß = C39F. It is being interpreted as ISO-Latin-1, giving the four letters C3 = Ã, BC = ¼, C3 = Ã, 9F = ... whoops! where's that second ¼ coming from? You'd expect Ÿ.
¼ and ¼ are different names for the same character. Are you quoting your actual output?
Somewhere in the bowels of your software there has to be a setting that lets you tell it the encoding of the original text. What happens if your original text includes characters that aren't in ISO-Latin-1?