Unable to scroll on the forum

So, the forum appears to be missing its scrollbar…and my mouse uses an “emulated” scroll-wheel that doesn’t work on all websites/applications (it doesn’t work on this forum).

I’m using google chrome Version 45.0.2454.101 m (latest version)
With no plugins.

edit: this is only happening on the battleborn “main” forum ( http://forums.gearboxsoftware.com/c/battleborn ) and none of the other gearbox forums or the battleborn sub-forums