Time wise delete causes corruption in measures with measure rest
Create a multiple instrument score (I used a string quartet) make time sig = 4/4
Put 6/8 time sig in measure 2 (this only helps make it easier to see)
in the first measure of an instrument make a dotted 1/2 rest.
In the first measure of another put a dotted 1/2 note on beat 1 (both of these measures now have a rest on beat 4)
ctrl+delete one of the 1/4 rests
Result: Measures with dotted 1/2 rest and dotted 1/2 note are modified, measures with measure rests still have 4 beats. This can be seen in one of two way. Change the measure rest to a shorter rest and see there are 4 beats. Save and reopen the score and it will be reported as corrupted.