After last update of developmental version 4:16.07.70+git201605171917~ubuntu16.04.1 - I find that KDenLive promptly crashes whenever attempting to delete any applied Effect or Transition.

Filed a bug report with backtrace via Crash Reporting Assistant (DrKonqi):

https://bugs.kde.org/show_bug.cgi?id=363194

Can't see how to change the "Assigned To" field from "Unassigned Bugs Mailing List" to jb or vpinon.