Hi! Last week I installed MIUI 3.5.2 but after I used it for a while it just frooze and then when I tried rebooting the phone the screen was just black after the triangle. I could double tap the home button so the screen went white. The only thing that fixed it was to wipe everything and reinstall it and then it would happen again. In 3.5.10 I still have this problem and it even happened when I just flashed Siyah to the stock rom. There was another guy here having this problem with 3.5.2 (http://miuiandroid.com/community/threads/bugs-3-5-2-galaxy-s2-i9100.20330/#post-164083) but it doesn't work for me how he fixed it. I have tried searching google but I can't find any help with the problem. Thanks for a great rom and sorry if my english is a bit bad.