STLLoader isBinary() check failing

[gfargo]

Not sure if anyone else has encountered this issue; was working on a project earlier today and noticed that the STLLoader class was failing to accurately determine what type of file my .stl was; binary or ascii.

Testing with STLLoader Example

Just to test, I passed the same URL (object being served from AWS S3 bucket) to the example that is posted in ThreeJS and was able to render the object immediately.

Testing within Meteor

When I reproduce the code within Meteor, the isBinary() check seems to silently fail or think that the object is ascii rather than a binary file so it ends up returning an empty Geometry object.

Seems like there is something within Meteor that is throwing off the automatic type detection at line 90.