I'm finding blurbs that the HDMI even with the *firmware update*, on the late 2012 Mac Mini is still ~buggy~ via HDMI.
I was going to buy a Mac Mini and use it as my HTPC......but HDMI is crucial as that will be my primary output
My mac mini runs 2 screens, 1 HDMI and 2 HDMI via thunderbolt connector, both are 100% flawless.