Photoshop's dark background for CS6 is great for color correction, but the tabbed panels are hurting my workflow, as I frequently arrange images and drag layers one to the other. One thing that Dreamweaver CS 5.5 has is a "Classic" view that allows me to make the application look like it did in CS4 and below. I would like to see the same in Photoshop CS6.
Others are remarking that it's not possible to drag layers from one tab to another, which seems like a bug.
I fear that the "full-screen" preference of many Windows users and the "full screen" option for Macintosh users (who are apparently afraid to see their desktop) has directed Adobe to be less document-centered and more application centered.
So, in my list of recommendations would be a "classic" view, with the "full-screen" view enabled for those who wish to color-correct on a neutral background.
I just looked at the Beta version and it's too many numbers to copy. I am running OS X 10.6.8 on a Mac Pro with 2 x 2.93 GHz Quad-core Intel Xeon (Nehalem) CPUs with 16GB system RAM and the NVIDIA GeForce GT 120 GPU. I use an Apple LED Cinema Display at 1920x1200 with 32-bit color.
You could try turning off the Application Frame (Window>Application Frame) and under Photoshop>Preferences>Interface uncheck Open Documents as Tabs and uncheck Enable Floating Document Window Docking
and see if that's more like you want.
You can also drag any of the image tabs out,
to get a full image window, and then layers can be dragged from one document to the other.
You can also, while tabbed, right click any layer, or group and choose "Duplicate",
then in the duplicate dialog box, choose the _other_ image document you have open to dupilcate the layers or groups to.
Good that we can do this as a work-around, but these actions are not consistent with the whole tabbed view setup...a tabbed view should simply allow for dragging a layer from one open tab to another tab....much like copying a selection by dragging it to the other tab.