This is a post from Xecuter.
After New Dash Update 12625 the following games do not boot (Black Screen):
Black Ops 2
Modern Warfare 2
This is an AP2.5 Update so naturally this does not affect non AP2.5 DVD drives (Early Hitachi & Samsung).
If you had LT+ flashed then you will NOT be flagged for a possible ban (good Job c4eva !).
If you did not have LT+ flashed and you tried to boot these games as backups then you are probably flagged for a ban.
News from a post of Xecuter
AP2.5 Data both PAL and NTSC have been extracted (thanks to c4 and k3) and c4 is now working on the patches and testing will commence.
There will be no need for a firmware update.
We recommend you do not update yet until there is a working method tested and released.
There is no ETA on release so do not ask. if you ask then other members have my permissions to facepalm the offender and ridicule them until they probably start crying.
This is confirmed update and info as of 20th Jan 16:43 GMT