Here it is final version of OSDark RFX (Remake For Xfce) of OSDark icon theme by gmaster. (Since I can't let down only fan of this theme XD). Now build from scratch using gnome default theme as template. It has support for xfce power and settings managers. Even copying has its own icons! Because this icon theme is not about being the greatest icon theme ever or covering the largest number of apps, but about correctness. There are a lot of good icon themes here on look.org, but most of them suffers from poor maintenance. There are often out of sync and need tweaking. They have included broken links because of using absolute paths instead of relatives. They have set wrong permissions – its common that they are marked as executable files. Or even have bad owner. When files are extracted from tar archive by root default behavior is to preserve stored id of an owner. Users unaware of that fact are simply granting access to areas of system normally restricted when they made system wide installation using such an icon theme. So, in short this is to make a theme free of this kind of issues.

Target distribution is arch (However ideally it should work for any distribution. Please note that this was not tested.)
Target x environment is Xfce 4.8 or later (Although it work quite well for gnome since its based on structure of its default theme)

md5sums:
968d694c6d2bcf449f990575fa632907 OSDark.tar.bz2
c6b63cc69a71749c6803ce8808a01a89 OSDark-blue.tar.bz2
7466d17dc8c2a3376984cd54ba2b6d6d OSDark-green.tar.bz2

Additional files:
To have menu button and emblem related to used distribution use OSDark-dist plugin.
http://xfce-look.org/content/show.php/OSDark+RFX+dist+plugin?content=139892

Release notes:
Over 100 icons were reworked since last update to provide better look.
This gives something like more than 170 icons in total. Please note that some of icons were replaced or removed from this icon theme even if they were changed at previous release. Still not a big art but in exchange you get new icons not included in other themes!
Doubtful content was removed. Mostly tremendous number of apps icons that actually did not add anything beside a weight since user could not even seen it otherwise than inspecting icon installation directory.
Finally this theme was rebuild from scratch using gnome default theme as building theme. So it should be compatible with anything that supports gtk.
It is free of icons that use other X environments logos.
Looks good with any gtk theme. Dark or bright.
Full support for context thunar menus.
New gtk buttons (View images).
Compact size with commonly used icons categories available in smaller sizes. (If someone has any valuable information about how it can affect performance please share it!)
Apps icons only for commonly used software. (What is commonly used is out of discussion!)
Currently there are no planned updates for it. However if any change will happen they will not be a great ones. (Something like replacing few icons with different versions, adding some symbolic links. That kind of stuff just to get nicer md5sums!)
Size of each archive is more than 7MB.

Want better? Want more? Write it... In worst case nothing will change.

Brief details:
Created on Arch
http://www.archlinux.org
Software used for creation, changing of some icons and its elements:
Gimp 2.6.12 - http://www.gimp.org
Artwork made by others
Some Dark Shine icons by sunx (included and modified from OSDark theme) http://www.wincustomize.com/explore/iconpackager/1698
Based on OSDark icon theme by gmaster http://gnome-look.org/content/show.php/OSDark?content=107460
Faenza libreoffice icons by funnyguy http://gnome-look.org/content/show.php/LibreOffice+Faenza+Icons+%5Binofficial%5D?content=138257
Few images grabbed from net with Free (Unrestricted usage license) then modified.