1. Create score.
2. Apply spacer to the first bar.
3. Open 'Parts'.
4. Create part for the instrument the spacer was applied to.
5. 'Create Part'.
6. 'Close'.
7. Open the part.
Result: The spacer isn't in the part.
Using MuseScore 2.0 Nightly Build (4837) - Mac 10.6.8.
Comments
Parts have a different number of staves and a different layout. Spacer are therefore not copied.
I partly agree, but I hope spacers are improved (see this ) to avoid situations where notes (etc) will collide.