Since Blu-ray movies often use 23.976fps, you should know these bugs related to the Intel HD4000:
1 The Intel HD3000 and HD4000 have a 23.976fps and a 23.976HZ bug.
2 A issue with creating/saving/maintaining the correct brightness levels (0-255 vs. 16-235) and or EDID overrides.
3 And of course the biggest new bug introduced in Ivy Bridge is the failure with certain 1080i50 streams (look in the graphics area). Especially the last one makes it currently unusable for users having the appropriate kind of premium content (mostly live-TV).
Thunderbolt and hdmi and the other connections are affected by the bugs listed above, since it is the chip itself.
Just google the problems...
Edit: Look at the post-time from priorypcclinic above my post. The posting
time from his post is: Today. 12:41 PM
My Posting is from.. : Today. 06:30 PM
What is wrong?