Photoshop :: Print Preview Considerably Darkened And Blue Shifted

The print preview in Photoshop CC and CS6 is seriously flawed, though that may not be apparent if you are working in sRGB at 6500K and a 2.2 gamma, which most people use by default. In my case, using "old school" print settings (Adobe RGB at 5000K and a 1.8 gamma), print preview is now considerably darkened and blue shifted.
 
Fortunately, files print correctly despite the flawed preview, which is what you would expect if the display profile is being ignored. A recent attempt by Adobe to fix the bug in Acrobat Pro was only partially successful for users of the most current version. The problem is still being investigated, according to the Adobe staff participating in the Acrobat forum.
 
I don't print much anymore--relying instead on soft proofing--and rarely from Photoshop, so I just discovered the print preview problem now in Photoshop CC. Of note is that the last time I printed from Photoshop CS6, which was at least several months ago, the preview was fine. But CS6 now exhibits the same problem. All of this suggests to me the possibility of a more fundamental color display error than just a Photoshop or Acrobat bug. (I wonder if it might even lead to Apple.)
 
My setup: MacPro running OS X 10.8.4, NEC SpectraView PA271W (includes calibrator), North American Prepress 2 workflow (synced across CC and CS6). In print settings, Photoshop is set to manage color using Canon MX870 profile for GL2 (glossy) paper. Of note is that in any combination of color management and print settings, the print preview is darkened and color shifted (in slightly different ways per whatever settings are in effect). I have not tried recalibrating the display for 6500K and 2.2 gamma, (more accurately, not reveal it), but that would undermine the print workflow.