I have an LG 49UB850V.I had the same update today (5.00.04)and i was happy with it, but after some use the OS restarted itself 2-3 times in 2 hours.After more usage i had these problems: could not change the program after ca 1 hour of watching, no infobar popped, and the "P" switch on the MR500 was also not responding, switched to HDMI 1, but could not switch back to TV, menu was slow as hell, if it worked sometimes. I found the downgrade tutorial, and that helped me(thanx SIMON)and now i'm back at 4.55.55. It's a shame LG put an update like these OTA, do they not test these OS-s before release? I mean i can live with some minor bugs, but a TV that don't change chanels and restarting because of low memory...thats a no-go. An ex-customer