I just got off the phone with Apple, and this is so ridiculous I have to share it. So I bought a new iMac in April with the best configuration available: 3.06GHZ INTEL CORE 2 DUO 4GB 800MHZ DDR2 SDRAM - 2x2GB NVIDIA GEFORCE 8800 GS W/512MB 1TB SERIAL ATA DRIVE APPLE MIGHTY MOUSE WIRED KYBD & USER'S GUIDE COUNTRY KIT,IMAC 2 Last night, I was playing Wow I got a kernel panic. I'm thinking "that's odd", but I rebooted the machine and started again. Another kernel panic. I restart the machine again and I get 2 post beeps followed by 3 beeps. No Apple logo. Do it again: 2 beeps and 3 beeps. I look online and this is usually cause by a memory error. Great. I load up hardware diagnostics and run a check. 4mem/1/40000000 error. Looked it up online and it could be due to bad memory. Ouch. So I go about it systematically. I take one of the 2GB chips out and run the test. No error. Take the other out. No error. Swap the chips to the other memory slot. No error. This is getting ridiculous. So I look online again: "Could be caused by a 3rd-party mouse attached at startup." I look at my MS Optical Mouse (one of these: http://wellcom.co.il/catalog/images/Microsoft/MOMB.jpg). They've been around forever. They're probably the simplest 2-button USB mice you can get nowadays. I use it for Warcraft. That can't be the cause. So I take the mouse out, put the Apple mouse back in and reboot the machine. Boots fine. Run the diagnostic tests. Checks out fine. I call up Apple this morning and explain the situation. I get to the part about the MS mouse. They stop me and say "yes, that's a known issue". A mouse causing kernel panics? Showing up as an invalid memory error? Are you kidding me?!? I say "you better be working on a firmware update for this" and they said yes. Well, I'm flabbergasted. What can I say? lol Never seen a mouse cause memory errors on an Intel-based machine. A word of warning: your $20 optical mouse could crash your Mac!