I used the following code, sometime last month, which fixed this issue

sudo wget -O /etc/init/docker.conf https://raw.github.com/dotcloud/docker/master/contrib/init/upstart/docker.conf
sudo service docker restart

But only temporarily. I tried to push again (4 weeks later) and I got the nasty error again.

 ! [remote rejected] master -> master (pre-receive hook declined)

This bug is like kryptonite to my patience. It appears that all issues for this happening in Dokku lead back to issues #496 & #497, and I have applied fixes in these issues without relief. I am running Nginx on DigitalOcean using Dokku v0.2.3 on Ubuntu 14.04 (w/ Docker 1.0)

Any tips?