Thanks for the firmware King5six1!
I'm happy to report that the upgrade went super smoothly. I just threw the unzipped folder on a FAT32 formatted flash drive, plugged it in, went to update from USB, and it found the file. It performed the optimization. No more POPS to report!
I have a PN59D550. YES!!!
Displays - Samsung 59" Plasma (PN59D550), Mitsubishi 73" DLP (WD-73640), Samsung 51" Plasma (PN51E550)
Equipment - Integra DTR-6.8 AVR, Xbox One, Apple TV (3rd & 4th gen)
Speakers - Tekton Design Pendragons, Pioneer SP-FS52 & SP-BS22