Installed 5.10, found I had the all off standby problem, did factory reset, did 5.10 setup again to see if factory reset fixed it, lost system settings again on power down. Installed 5.08 without doing another factory reset and seems to be working.One thing I did notice, with 5.10, after I did the first setup (before factory reset), powered down, lost system settings and put the settings back in again, it still had all the "To Do List" settings saved, all the TV programs to be recorded were still there from the previous 5.10 setup.