Automatic Part Extraction
In reference to http://musescore.org/en/node/14578 , here is a patch that allows the user to automatically create all parts based on the instrumentation. I believe these changes would be helpful for both 1.2 (or subsequent 1.x releases) and 2.0. I intend to create another change which will allow the user to save all the created parts as well.
Please let me know if I need to change anything; I created a patch from git as indicated on the Development page, but I don't know if there's anything special I need to do with it.