Earlier this month, Nintendo stealthily issued a Wii firmware update in Japan — version 4.1 — designed to fix an unidentified issue in Wii Sports Resort. The supplied changelog is rather vague, mentioning only that this update includes “behind-the-scenes fixes” designed to improve system performance.

If the same Wii Sports bug exists in overseas copies of the title, rest assured it is fixed with firmware 4.1. On another note, Nintendo warns that 4.1 will check for modified save files and automatically remove them. Avid users of homebrew beware and update with caution.

Follow this author on Twitter.

Read more: Wii Firmware 3.3 Drops, Renders Twilight Hack Useless,  New Wii System Menu Update Hits, May Block Homebrew Channel,  Twilight Hack Protection Thwarted, Fix Expected Soon,  Homebrew Channel Beta 9: SDHC Compatibility,  Super Mario RPG Hits Japanese VC In June