Copying from within a tuplet bracket to the same or another or to a normal rest produces strange results
There are many bugs on triplets, so please forgive me if I'm reporting a duplicate here.
Open the enclosed score. Select the 1/8 triplet. Cut. Select a rest, any rest, and paste.
Result, a 1/4 triplet is created. If you past onto the last 1/8-triplet rest in the bar 2, bar 3 is affected.
WIndows XP, MuseScore 1.1