All-clear, thanks to Grabber 5.0:
**** Update June 28, 2014: version 1.2 of the patch fixes the json parsing error that started recently and restores sync functionality again. Also note: If you already have a previous verison of the gsync patch installed, you must remove the previous patch version first to restore the original files. The new patch patches all required files, not just the new one. (this is standard for any patch that is not installed from the feeds) ****
**** IMPORTANT – as of late June 2014 there is a new issue with Google contact sync that has not been resolved! Up until a few days ago, this patch still restored the ability to sync calendars and gmail, but now, it appears accounts can no longer be added to devices due to the ‘unknown error’ situation. DO NOT CHANGE YOUR GMAIL PASSWORD OR ATTEMPT TO REMOVE AND RE-ADD YOUR ACCOUNT TO RESOLVE LOGIN ISSUES, OR YOU WILL BE STUCK WITHOUT YOUR ACCOUNT AT ALL ****
Stay tuned, there is already a one-ways solution ready!