Working on an update... Technically, almost a full rewrite.
The original Black Abyss theme was hackish at best. The following release after it was an improvement, but really was rushed through. After which it was decided not to continue Black Abyss both because of time restraints and simply, the pure frustration on how hard it is to make an all black style in XenForo without CSS code modifications.
Strangely enough despite the flaws and how rushed through it was, I recieved a few people asking me if I would update this. I kept to the standard, "no" as my reply, except even my members wished for a dark style.
There are some paid developments, but usually they have a lot of code added to it and keeping to the stock for my own needs sometimes made that conflicting.
So with the occasional request from both here and on my site, I finally made an update (May 21, 2014). This update was not complete as I had basically taken the old XenForo 1.1.x template, reverted the changes, but did not take into the full account of the many (excessive) style properties.
Currently, XenForo does not inform you of outdated style properties. Which can be VERY frustrating.
This beta is a completely remade from scratch. I started over and redid everything. Yet I encourage people to test it and help debug any issues they may have discovered. Ideally, I would prefer not to add any code.