Am 2006-09-27 um 09:55 schrieb Hans Hagen:

>> If I add --ifchanged to the lilypond call, it never does anything;
>> without it's called twice (like before, I couldn't find out why).
> --ifchanged=filename

Ah, great!
Here's the new version again (Willi, please try this, no need for  
patching any more!).
I also updated the wiki: http://wiki.contextgarden.net/LilyPond

Greetlings from Lake Constance!
Hraban
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