Notice: At this time, WiiBrew recommends that you do not update your Wii through Nintendo, as it disables some homebrew (DVDx, PatchMii). Recent reports suggest System Menu 3.4 removes all custom channels.
Instead, you should use the Wii Shop and IOS51 installer to update and prevent anything from being disabled.
Update appears to include IOS50 (used by menu) and IOS254 (a copy of IOS9, to block PatchMii).
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North America
Wii Menu version 3.4 is now available for your Wii console. To update your Wii Menu to the latest version, please select the Update button at the bottom of the screen or select the System Update option in Wii System Settings.
With this update, Parental Controls have been enhanced, USB keyboard support is available for the Mii Channel, and system functions have been improved.
The Wii User Agreement, which includes the Wii Privacy Policy, has been updated. Because the updated agreement applies to you and your use of the Wii Network Service, you should view the updated version by clicking on the Wii icon located on the lower-left portion of the Wii Channel menu, selecting Wii Settings, accessing the Internet setting, and selecting User Agreements.
You may also view the updated Wii User Agreement online at
http://support.nintendo.com
Because unauthorized modifications to save files may impair game play or the Wii console, updating to Wii Menu version 3.4 will also check for and automatically remove such save files.
Please note: If you've updated your Wii Menu after 11/17/08, you may not need to update again.
Thank you for updating your Wii console!
Nintendo[1]