OTA FROM 1.24.709.2 TO 2.28.709.1
update at Apr 20th
with old version of HBOOT,there're many bugs such as wifi and launcher etc
with new HBOOT,those bugs above are gone but you cann't use 3rd-party recovery like CWM right now.
that means you can not even root it.
I think even you can make Recovery work,there are no way to downgrade your firmware from ICS to GB because of the new HBOOT