Nintendo has pushed system menu 4.3u to the public, there seems to be no real system menu improvements just patches that removes "Unauthorized Modifications" DO NOT update if you want to keep The homebrew Channel / and or cIOS and any other hacks.

EDIT1- Seems this update also removes the ability to use "Riivolution"
EDIT2- Added the changelog
EDIT3- Waninkoko posted on his twitter " Firmware Updater 4.3 is on its way...     about 1 hour ago  via choqoK  "

Nintendo Wrote:Most Recent Update:

June 21, 2010

Wii Menu 4.3

Unauthorized Modifications
Because unauthorized channels or firmware may impair game play or the Wii console, updating to Wii Menu version 4.3 will check for and automatically remove such unauthorized files. In addition, there are some behind the scenes enhancements that do not affect any prominently-used features or menus but will improve system performance.

If you are seeing "Error:004," please click here.

WiiBrew Wrote:Changes

    * Deletes the Homebrew Channel and DVDX, title IDs HAXX, DVDX, JODI, DISC, and DISK.
    * Now uses IOS80.
    * IOS254 stubbed BootMii is deleted.
    * Fixed Bannerbomb less stupidly this time.
    * Added IOS58.
    * HackMii Installer Userland+Syscall IOS exploit removed
    * NANDFS privilege escalation fixed
    * ES_AddTitleFinish now checks the signature(Trucha Bug Restorer and similar won't work anymore)

- Source: [Nintendo]

- Source: [WiiBrew]

(This post was last modified: 22/06/2010 07:25 AM by YoYoBallz.)