Selecting notes with Shift + mouse drag in chords
See whole discussion here: http://musescore.org/it/node/25195
1) Open the default demo score, Bilder einer Ausstellung
2) Select the lowest notes of the third bar (g a g f d) by drawing a selection box with Shift + drag
3) Try deleting the notes with Del key or transposing them with the arrow keys or Ctrl+C copying them anywhere else
You can't delete/transpose/copy but the whole chords the notes belong to.
Of course this happens in every similar situation.
(This happens both in stable version and 2.0.0 Rev 8917b06, the latest nightly build I've found.)
Wouldn't it be more logical (and useful) if delete/transpose/copy/everything else worked just on the selected notes? :)