Has anyone with an '09 Mac Pro found that their CPU temps have been even lower with 10.6.3 as opposed to with 10.6.2 and the Audio Update? I use my quad '09 for music production with Logic, so obviously have been really tuned in to CPU temps since the old fiasco (I'm sure anyone who has been using the Mac Pro section of the forum for three months or longer WILL know what I'm talking about!). I was very happy with the CPU temp of my machine once the Audio Update was applied, but it's dropped way down even more since I installed 10.6.3. For example, during a moderate Logic session with loads of other apps open, it would have been 48C - 50C, now in the same situation it's hovering around 36C. The thing is that the day I updated to 10.6.3 was pretty much the day that our heating went off, so there has probably been a change in ambient temperature, and therefore I don't know whether the update is responsible or not. I can't test with the heating on, as it's not under my control. Whatever the reason is, I'm happy, but was just curious to see whether anyone else noticed a difference.