After OS X update moving 1:1 images results in low resolution and a long delay to snap into high res

Question

After the OS X 10.8.5 update on my current generation 27' iMac moving 1:1 images results in very low resolution for those areas I am moving to with as long as a two second delay before the image snaps back into full resolution. Not only that but when it snaps back into full resolution you see a shift in alignment and a snapping into place with the nearby area that was already in full resolution. This is awful and is occuring with Lightroom 5 and 5.2. Has anyone experienced this?
My iMacs specs are the current generation 27" iMac, i7 3.4 Ghz, 32GB RAM, and the NVIDIA GeForce GTX 680MX 2GB running OS X 10.8.5.
I did not have this issue with OS X 10.8.3.

Answer 1

I have noticed something similar on my Win7x64 system, but am not able to reliably reproduce it. It seems, for me at least, to be a combination of +Clarity and Lens Profile Correction which will always trigger an observable screen redraw when moving from segment to segment in 1:1 view mode. The variable is the delay.....most often it's a fleeting effect, but occasionally there's a more obvious delay in redrawing the image display. I suspect the more obvious delay is, in addition to the +Clarity and Lens Correction, some internal resource utilisation over a longer Lightroom session....certainly every time I've encountered it a Lightroom restart has cleared it up.
Don't know it that helps, or gives you any pointers to reducing the impact. Because of another "issue" with Lens Corrections (when it's applied, Spot Removal work gets slower), I tend to apply it last of all when editing pictures....so that also helps avoid this 1:1 screen redraw problem.