The
CSS2 specification does not mention what should happen with the space before/after a block marked with letter-spacing, it even says "character spacing algorithms are user agent-dependent", so it's a sort of gray area. What it says, however is "when the resultant space between two characters is not the same as the default space, user agents should not use ligatures", this is against the usual practice in German, as in the example I linked to in post #6. Of course, ligatures are rarely used by XHTML renderers anyway
Did you try with Prince, frabjous?