musescore/MuseScore — pull request #704 by emeraldimp (2014-02-17 05:13:13+00:00)
Title: When adding and instrument to a score with a pickup bar (anacrusis), set...

... the displayed duration to the pickup length and not a full measure rest.

This is in response to http://musescore.org/en/node/6055 (dupes at http://musescore.org/en/node/23644 and http://musescore.org/en/node/13262 )