Issue Summary

The pg build frequently but inconsistently fails the following test:

Tag Model a Post setting tags from an array on update attaches one tag that exists in the Tags database and two tags that are new to the Tags database:
+ expected - actual
+4
-5

full gist here

which is really weird. It also regularly fails with:

1. Settings Model API can read:
   TypeError: Cannot read property 'should' of null

Also shown in the same gist.

Steps to Reproduce

Unknown - trigger a few builds, one is bound to fail!

Technical details:

• Ghost Version: 0.4