Carl, nice, thanks.
Playing with the mac version, couple of nits:
* New > Create in > there's no "New folder" button in the location
chooser
* Both the CPL's and the PKL's IssueDate get set to UTC instead of local time
* You almost never want video to be stretched. Loading a 1:1.33 video defaults to stretch
* Padding an audio source (Mono) with silence to 6 channels results in a "10"
moniker in ContentTitleText -- apart from being misleading when the final audio actually
has 6 channels "10" is not a valid moniker in DC context
Wolfgang