Just to clarify (I don't use gnome-zen-mini ) from your post it seems that
printerdrake isn't installed during the main default installation of zen-mini and you then have to install it ?
Have you tried installing zen-mini on an internal HD to see if printerdrake still has problems - mind you it shouldn't really have problems if its internal or external

You could try installing printerdrake
before doing any updates
If you then update and you have problems you'll know its one of the updates causing it (this is clutching through

)