Hi everyone, I have a strange problem with my C2D 2.33 MacBook Pro (the 15" one), where any audio output through the headphone jack results in a little 'click' sound before and after the intended sound. This happens in all applications: when changing volume (with feedback sounds turned on), after IM notification sounds, when playing/pausing iTunes / Logic Pro, etc. It's especially annoying that I bought this laptop with the intention of playing demos of rough mixes to clients. I went to the Apple Store in Meadowhall (UK) today after two or three repairs not fixing this problem, and the 'Genius' I spoke to discovered the problem exists on ALL machines using Core 2 Duo processors (iMacs, MacBooks Pros, etc.) on display in store. The problem doesn't occur when using iPod earbuds, though (presumably due to their poor frequency range), but any decent pair of headphones should show up the clicking problem. There is no problem with the built-in audio on my Dual 2Ghz PowerMac G5. Has anyone else noticed this problem on the Intel machines? Seems strange that I can't see a thread about this problem already if this is an issue with all Intel machines.