My MI works perfectly with firmware 1.54, had it for 1yr now. But sometimes it just starts refusing to boot backups completely... retail games/DVDs still play fine, but backups just will not load at all.
To fix this in the past, I'm not sure exactly what I did, but I'm pretty sure I deleted settings/saves off the MC till it started working. Now I've confirmed it... when this happens, if I remove the MC I can boot everything, MC back in = no boot.
It seems like certain games are writing something to the MC which stops booting all backups... does this sound possible, or has anyone else experienced it?