The scrollbars for navigating the Community list and main feed are something of a train wreck from a UI usability point of view.

1. Hiding scroll bars is never useful, you're left to guess if there's anything else to find.

2. When they first appear, there's very little colour distinction between them and the background, which makes them hard to locate for those with vision impairment.

3. Even when you hover over them, the amount of contrast to the background is about as low as you could get away with.

4. This interface is hardly struggling for width. The scrollbars could be at least twice as wide without impacting on anything else, and make them much easier to grab.