Copy and Paste Grace Notes

There's a problem reported in the Italian Forum regarding copy and paste grace notes. In order to reproduce this problem:
- set a new score with 3 instruments
- write some notes in the 1st bar of the 1st instrument
- add a group of four grace notes
- copy the whole bar
- paste in the 1st bar of the 2nd and 3rd instruments

The grace notes are pasted, but with some problem regarding offset: see attached files.
Using Musescore 1.1 with 11.04 Natty Narwhal. Same problem with Musescore Nightly-r5092 via Wine.

Thanks
Antonio