Actually, Rui, it's the other way around. Measures 2 and 3 were changed from a plain 4/4 to 3/4, the same time signature as the first measure. Sometimes it changes all the measures to 3/4. Sometimes it changes all the measures to 5/4. When i made the screen shots, i was playing qtractor in loop mode with no midi connections. i went to the list and saw your second message and post script. i can't get to any debugging until tomorrow. Hopefully, i'll notice something useful. Thank you, again!