Camera (Disable HW overlays in Settings->Development if you face Reboot)
Calls & data
Hardware acceleration (videos need s/w decoder at moment)
Headphones (I think it is fixed)
Voice input (GNow)
In my last test Got battery life of 2d 10 hrs with all the features on and exchange active sync on push mode.
Added Ability to disable hardware acceleration for specific application. use HWASettings Read Here and Here
Front Camera/Video Camera
Mic Mute During calls (Fixed in Update1)
report if you find anything else
AOSP JellyBean for HD2
MIUI-Jellybean for HD2
MIUI-AU ICS v4 for HD2
MIUI.us ICS v4 for HD2
MIUI-Jellybean for Sensation
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