Comment 12 for bug 888504

The problem is with the sync-collection structure in lightning 1.0b7. I did that to work:

modify lightning internal files

file : components/calDavCalendar.js
    comment line 1305.

file : calendar-js/calDavRequestHandlers.js
    insert code: break; on line 576

go to this site to get your urls to calendars and task http://icloud.niftyside.com/

Something for contacts ?