i just posted this in XDA, but just in case:
dalvik.vm.heapsize=32m
thats the MIUI stock value for the heapsize, you guys set it to 24mb with the english pack.
I discovered that the stock launcher has NO issues with 36mb value (i set that instead of 32 cause i could not remember it right, will now test with 32).
With the 24mb value, the launcher FCs a lot, stops being able to "move/rearange" items, etc