I've been using Lightroom 5 for awhile now and never had an issue until a few weeks ago. Now every time I try to edit photos I get a split second blur. While moving any slider it's a constant issue and distraction. Even when you use one slide and are moving about trying to decide on how much or how little. The constant blur of stopping and starting the movement of the slider is distracting.
Odd thing is... I still have Lightroom 4 on my computer and it doesn't blur when using the sliders and acts like normal.
Lightroom 5 has only started doing this for the past few weeks.
I have un-installed and re-installed Lightroom 5 a couple of times.