d-push: Array to string conversion (8) failures

[Geoff Silver]

Upgraded to 16.04.1 LTS. d-push was removed during the upgrade. I did an 'apt-get install d-push' to reinstall, though it was generating a lot of "array to string conversion" errors and my iPhone wasn't seeing any new mail. I then attempted to purge and reinstall with a clean image by running 'apt-get remove d-push; dpkg -P d-push; rm -rf /etc/d-push /var/lib/d-push /var/log/d-push; apt-get install d-push'. That did force a resync but I still cannot see any mail

d-push.log shows "/usr/share/d-push/lib/syncobjects/syncobject.php:302 Array to string conversion (8)" and "/usr/share/d-push/lib/core/streamer.php:237 Array to string conversion (8)" dozens of times for each message.

d-push-error.log shows "Ignored broken message (SyncFolder). Reason: '4' FolderId: '' message id 'XXXXXXXX'" for every folder. Repeats for SyncMail as well for every message.