Just purchased a new iMac 24" (3 ghz, 1 TB HD, 4 GB RAM, etc). By and large it's worked great, but I noticed one problem: plugging in my headset in Windows doesn't work. I've done a Google search and apparently older Mac Pros, Macbook Pros, etc. had this problem. They suggested using a powered mic or a USB mic (bleh). Is this still the case?