Guys! DONT UPDATE. USE THIS TO UPDATE INSTEAD:
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This is a patchmii upgrade which installs IOS51 (the new Nintendo Wii IOS) and patches it to remove the fakesigning bug prevention (the hacks prevention Ninty put on us), so we can use the wii shop channel and all online functionalities like if we were on the latest version of 3.3.
This update does not patch any of the other ios so it is safe and it will update your wii shop channel too I think. So with this update you will keep your previous version (im on 3.2) but you are still able to access internet features on wii (like shop channel) without being on the latest version of 3.3.
So it's the latest firmware version but without the hacks prevention. I recommend downgrading from 3.3 (minor update) to 3.2 first and then installing this new update to IOS51. This way you get everything while still keeping homebrew, wads, and dvds on wii (and trucha signing if you're on 3.2)
Good luck! And long live homebrew and hacks!!!