Wow, so after a very careful debate and some great input from the MR support system, I decided to buy the new LED ACD. I open it up yesterday, hooked it up to my Mac Pro and started using it. It looked great, needs a calibration of course, but overall I was impressed. Then I started to hear a ticking or almost a creaking noise. I thought it was my desk 'settling' as I had added some extra weight to the desk, and because I was leaning on it at the time to connect the cables up etc. I closed my eyes and leaned next to the machine and waited - it wasn't coming from the ACD speakers, it was coming from the monitor itself. I checked it out on some Apple support threads, sounds like it's an issue of heat contraction and expansion as the monitor starts up. 10 minutes into having it on it was somewhat slowed, but my goodness it was annoying. Anyone else have these issues? Recommendations? Call up Apple? I'm really, really bummed out.