I am running on Windows. don't know if it matters.
Yeah, it appears to work as expected on Windows installations.
However, there are now two known instances of Mac users that can't see any of the plugin's features, which leads me to suspect there's a platform dependency/bug in one of the plugin's dependencies -
i.e. another plugin or core eclipse code (I've verified my plugin code itself does not have any platform-specific assumptions). My guess is that the problem is in the DLTK tookit plugins which I rely on, but I can't begin to debug it until someone with a Mac sends me the associated stacktraces in the error view/log.