Hi,
maybe I found an issue in VoyageMongo/Magritte, here is what I've done:
loaded a fresh Pharo 4.0 image
loaded VoyageMongo via Configuration Browser (Install Stable Version)
opened up a Playground and did (via the green 'play' button):
|repository|
repository := VOMongoRepository
host:'hostOn.mongolab.com'
port: 43158
database:'databasename'
username: 'username'
password: 'password'.
repository enableSingleton.
repository inspect.
This leads to an error which seems to be connected to 'gtInspectorMagritteIn:' (see attached screenshot) which was updated in the package Magritte-GT on 03.06.2015. (no instance 'repository' is going to be created).
Please excuse my bad analysis on this, because I have only very limited skills.