Hi, Not sure why or if anyone else is experiencing this problem. I installed rev13a earlier this week and noticed since that when I power up the Wii, it randomly hangs at a black screen. Usually a simple power off and try again works and the system menu comes up. It seems to be random but it has only started happening since I installed 13a. Could that be coincidence? Could it have something to do with the USB drive connected to the Wii during power up? I tired unplugging it and was able to successfully get the menu to come up 4 times in a row (did not have time to keep testing) but it never caused problems with rev10. I also have Preloader 0.29 and latest Bootmii installed if that has any effect on it. Any feedback would be appreciated. Thanks.