HDMI sound stopped working when upgrading to Lion

I have a mini connected to my TV via HDMI (video and audio). It has worked nicely until a few days ago when I upgraded to OS X Lion, then the audio disappeared. If I open System Preferences -> Sound -> Output I can see two possible outputs, the earphones and my TV. If I try to select the TV as output it is immediatly changed back to earphones.
It all worked fine in leopard, does anyone have a clue why it has stopped working in Lion?
BR
Johan

I have found a workaround. I seems like if I unplugg the headphone jack, which is normally connected to my stereo, I can select HDMI as sound output in system preferences. It really makes no sense, I hope they fix this in the next release.
/Johan

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