bad HTTP status: <status 1.1, code 400, class 4, Bad Request>

[Ken VanDine]

I'm seeing the following error in sync-monitor.log

Sync Report
  "dir" : "/home/phablet/.cache/syncevolution/google_+contacts_+2-2014-04-10-15-37"
  "end" : "1397158663"
  "error" : "error code from SyncEvolution remote, status 400: PUT: bad HTTP status: <status 1.1, code 400, class 4, Bad Request>"
  "peer" : "google-contacts-2"
  "source-contacts__uoa__2-backup-after" : "-1"
  "source-contacts__uoa__2-backup-before" : "-1"
  "source-contacts__uoa__2-first" : "false"
  "source-contacts__uoa__2-mode" : "two-way"
  "source-contacts__uoa__2-resume" : "false"
  "source-contacts__uoa__2-status" : "400"
  "start" : "1397158638"
  "status" : "400"
"[4/10/14 3:37 PM] Sync done: <email address hidden> (contacts) Status: 400 Error: Unknown status Duration: 25s"