Trying out the new PS 2015, when I try Save As several times, the display is turned into B/W rendering (well, some kind of greyscale but very "blackish") - even though the files saved seems OK with colors!
I have tried to cut out some areas of the screen to illustrate it:
The left part of the image shows the screen when rendering error occurs during second save while the right hand side shows the "original" image (and the one that is saved). Notice that the cyan is grey while the rest seems B/W.
No art boards - very straight forward save as I only opened the file to save it in web formats (various kinds - all triggered this behavior).
I haven't seen it anywhere else during my work.
I have calibrated the monitors with Spyder HW/SW but the rest of the screen appeared normal - just the image rendering was changed.
PS: Sorry about the late answer but I am not a pro/everyday user.