I'm going to start a new thread on this as I will be linking to some information that owners of Panasonic DVD-RP91 players will be interested in and I will "stick" this thread to the top of the forum listing to make it easy to find for a few days. First thing, Panasonic will not be any help here. This is not a Panasonic service procedure or product. This firmware update disc is to be considered unofficial and if one screws one's player up using it, tough titty. So much for the requisite scary warning. This firmware file that is now making the rounds was created by an obviously talented techo-dude by "ripping" the firmware from a newer player. Panasonic does have a "DVD Recovery" disc that is available for something like $10, but this is an older firmware that does not fix the "left shift" problem. I'm assume the guy who created this file used that disc with a newer firmware. There is a thread on AV Science forum with not only a good deal of first hand info on doing this, but also a direct link to a site that is hosting this rather large file (Thanks, Robert)... AV Science RP91 Firmware Thread Potential users, read the whole thread. This operation is not as "cut & dried" as it sounds at first. I burned a total of 5 discs using 3 different programs before I got a disc to work. I still couldn't tell you why the last one worked and the others didn't. Others that understand file formatting and such will have to offer their expertise. Lastly, I can tell you first hand it does work. The procedure is simple once you get a disc the player will read. An on-screen message comes up advising if your player needs the update. One has a single selection to make with the remote. The rest of the procedure is automatic. Also note, all player settings will be returned to factory default. Have fun!