Lightning 3.8a1 not working with thunderbird-trunk on Ubuntu

Hi,

Using:
Ubuntu 12.04
Thunderbird Daily - 36.0a1 (2014-11-14) installed from ppa (https://launchpad.net/~ubuntu-mozilla-daily/+archive/ubuntu/ppa)
Lightning nightly - 3.8a1 (from 2014-11-12 to 2014-11-24) installed manually from https://ftp.mozilla.org/pub/mozilla.org/calendar/lightning/nightly/

Have only just had time to test in fresh profile - no other addons installed.

Only one google calendar added (I normally have 6!) using caldav (not the provider)

I have a log of the error console with calendar.debug.log and calendar.debug.log.verbose set to true in about:config

First part is just the startup messages, then messages after right-clicking the calendar and choosing 'Synchronize'.

However, I can't find how to make an attachment through google groups, and posting the whole log in this message gives an error on posting.

Anything I can do to sort this out? Let me know if I can send the log anywhere.

TIA,

d