I can confirm, this fix doesn't help much.Espionage724 wrote:
http://support.microsoft.com/kb/2908279
Not sure if it fixes the exact issue with osu! or not though.
Edit: Doesn't seem to help. If you want to test it, you have to flag osu!.exe to be affected by the update (instructions under "How to extend the update to other games").
Why, Microsoft? So close and yet..