You don't have a minuscule 't' in it. The same problem as with 'Playing jazz vibe chords quickly excites my wife.', my personal favorite. :)

The string I use most often though is 'The quick brown fox jumps ovér thč lazy dög.'. It shows if the font has all characters, and if it has capitals, accents, umlauts and a dot, in which case most fonts will be usable for most iso-8859-15 charset users (default latin1 + euro, used by most European languages including Dutch and French, which are relevant to me).

*RANT* I find it hard to understand how one can design a whole font, character by character, which takes an incredible amount of work to do right, and then not take the time to at least just copy the characters that need umlauts and put two dots on top.