yea man i have all DLC's and i don't think thats because of any single object or glitch. Xbox just overdozes too easily. I have also pretty old box (2 years soon) so maybe it's little freezemaker ? Yeah losing your brilliant work is most annoying thing that could happen so you just have to save very often. I save everytime after finished single part of park (fountain or small plaza, etc.) But anyway, three days ago i found out that when i sign out from Ea Nation, freezing stops...almost. But yea i'm just finished my new park. It took four days to create it and only in two first days my xbox freezed/crashed 11 times (like in 7 hours). After my box couldnt get connect to ea, it didnt crash at all. Yesterday i tried to signing out of Ea Nation and it really helped. It freezed only once in whole creating progress which was like 6 hours. I'm not sure is it really working, or did i just had good luck or was it just placebo.. Hope it helps