title: Unable to push to Google Container Registry - Bad request
body: <p>Having a problem with pushing to "gcr.io" or "us.gcr.io":</p>
  
  <pre><code>[]# gcloud docker --authorize only
  Short-lived access for ['gcr.io', 'us.gcr.io', 'eu.gcr.io', 'asia.gcr.io', 'b.gcr.io', 'bucket.gcr.io', 'appengine.gcr.io'] configured.
  
  []# docker push gcr.io/tre-dock/pytest
  e817ce2379ed: Retrying in 1 seconds
  c543d14fcca9: Retrying in 1 seconds
  a147e49918ce: Retrying in 3 seconds
  063ca6c7c6e9: Retrying in 5 seconds
  8f045733649f: Retrying in 7 seconds
  unknown: Bad Request.
  </code></pre>
  
  <p>Yet when I try to push to "b.gcr.io" - everything seems to work.</p>
  
  <p>What do I miss?</p>
  
  <p>Environment:</p>
  
  <pre><code>[]# gcloud --version
  Google Cloud SDK 101.0.0
  
  alpha 2016.01.12
  beta 2016.01.12
  bq 2.0.24
  bq-nix 2.0.18
  core 2016.03.11
  core-nix 2016.02.05
  gcloud
  gsutil 4.17
  gsutil-nix 4.15
  kubectl
  kubectl-darwin-x86_64 1.1.7
  </code></pre>