I noticed a difference between 0.6.4 where some errors thrown by tests don't print as much information as they used to.
In my particular case, a TypeError was getting thrown. Something (I presume vows) was just printing
[TypeError: object is not a function]
In version 0.6.0, it just throws an uncaught exception and I'm able to see the stack trace as well.
Is this still an issue in email@example.com?