Sorry to be "that" guy again but it's yet another website overwriting my browser's scrolling behaviour which makes it really annoying to explore the site. I don't know why people think it's necessary to "fix" my browser.
So sorry about that. Would you mind sharing what browser you are using, so we can take a look at it.
Chrome Version 39.0.2171.71 (64-bit) / Mac OS
It's probably related to "jquery.nicescroll.min.js".
Why do you need his browser just to disable this feature? If that helps scrolling is broken (AKA not the same as in any other site) in Firefox and Chromium under linux.
We hadn't observed this before, so I wanted to make sure we were able to reproduce it and test the fix.
I am sorry you are having trouble with the scrolling as well. Looking into it and will get it fixed ASAP.