Just received my new 15" i7 Macbook Pro today, and I like it a lot, but I'm having one major issue. I get awful static when I plug it in to my speakers via the headphone jack. I had no issues with the speakers on my previous Macbook (from around 2007). I even used the speakers just this morning with the old MB. The static comes whenever a sound is played, whether iTunes, a system sound etc. If there is no sound for a few seconds, it goes away, but immediately comes back the next time there is a sound. The static is fainly present using my Sennheiser headphones, and also with the built-in speakers. But the sound is horrendous with external speakers. I've seen a lot of people with similar issues while searching the web, but no real solutions. Does anybody know?