While watching a Steve Perry video on the Nikon 300mm f/4 PF, he mentioned there was a service advisory issued for the early copies of the lens. Supposedly when mounted on the D8xx bodies, there is a problem when the VR is engaged at slower shutter speeds causing the images to be a little blurry. I wondered if anyone has encountered the problem. Nikon offered a firmware update, but Steve wasn't sure that would take care of the problem. His comment comes in around 6:30 in the video.