plone/plone.app.event — pull request #82 by gbastien (2013-07-18 14:40:00+00:00)
Title: iCal import fails because isinstance compare 'start' to 'datetime' instead of 'datetime.datetime'

Moreover, removed isinstance check by is_datetime from plone.event.utils...

Please review/merge/...

Thank you!

Gauthier