I think i found a bug.. those birds must be really angry. I have a folder called "Games" that's sorted by app name. Angry birds is one of the apps. I installed "Angry Birds Seasons" and put that app in the folder. Now, when I try to open the folder the launcher crashes. I have to uninstall the app and it works again. I can put it in the folder with a different sort method and it works. My suspicion is that both apps are named the same thing and so it doesn't know how to sort two identical names. I am running the 11.26 (latest) version of MIUI.