I've been having startup and sleep issues with my new iMac. It looks like I'll have to take it in for servicing after all. It's kind of disappointing since I bought it in July. I reinstalled the OS, which didn't work, then did a clean install, wiping the hard drive...still no go. What the heck could it be? The Applecare tech had me put it to sleep on Safe Boot, which DID work. Anyone else have this happen?