My m100's have been cracked since late February and they were purchased late January. It took exactly 31 days for them to develop a pretty size-able crack. I think the plastic that is used for the earcups is much too brittle although the hardness of the plastic may have an impact on the sound.
yep, mine were just sent for repair. id like to see a more standard cushion holding design.
I think the the plastic snap in system is too fragile.