I've just flashed my x5 with the u8800 aurora rom. All went well when flashing, but when I go to boot, I get to the screen saying IDEOS, and it stays there. I've left it alone for 30 minutes, and when I get back, it is still there.
I've already updated Clockwork mod to 220.127.116.11.
It's not a major problem, because oxygen rom is still working, but i'm keen to update to ics, and the MIUI roms dont seem to agree with my phone.
To install, you must have upgraded to the official gingerbread rom and installed CWM recovery 18.104.22.168 or 22.214.171.124.