Weird BLACK FRAMES ...

Folks, I'm suddenly getting these weird black frames around every selected item or window. It first emerged when I was working in Photoshop, and suddenly a large black frame covered part of the monitor (emerging off the screen). This black frame would disappear & reappear when I would click out of the image area (clicking inside a palette, or other item)... as soon as I would begin rendering again, boom, the black frame reappeared. Sometimes it would partially conform to the boundaries of my image, sometimes off to the side and running off the screen as though it was indicating the boundary for some large phantom window.
When closing Photoshop, the weirdness continued, with black frames forming around ANY icon or entry window. ----- I tried restarting my Mac, even shutting the machine off for awhile and rebooting. The frames came back.

Also... in the Apple pull down menu along the top, there are now 2 Restart lisings, 2 shutdown listings, and 2 Logout listings (I don't recall ever seeing TWO of each of these).

Is my OS corrupted somehow? (as it is NOT isolated to Photoshop, but appears constantly.)

Thanks for any tips or notions!