Hey Everyone, I just thought I should offer a new thread here for keeping track of this embarrassing issue. My 15" 1.5ghz AlPBook is right now getting its third replacement main logic board (MLB) since I got it in late February 2005. Thankfully enough for me, all trips to the Apple Store have been covered under warranty, but I don't expect this MLB to last more than the last one did (2 1/2 months). For anyone who owns an ALBook, has installed 10.3.9, and has not experienced this phenonenon yet, here are some of the common symptoms you should watch for: 1. System suddenly starts running much slower than usual, with a lot more swap-outs to the HD than normal 2. "About This Mac" shows less RAM than you installed 3. When you physically check you RAM, or have any shop test it, it's fine 4. If you have different sized chips, swapping them out reveals that the lower RAM slot is toast, not your actual RAM. 5. The problems began when you upgraded to 10.3.9 or Tiger from 10.3.8 or lower. Additional accompanying problems also reported include: --no boot chime --intermittent kernal panics --excessive heat I had been following this issue on the Apple Discussions site, but just today their moderators shut down the main thread. There are probably a dozen or so smaller threads dealing with the same issue. I am lucky because my machine is under warranty, but there were at least 350 or more posts on that thread alone who had precisely the same problems I have experienced, and the majority of them upgraded to 10.3.9 after warranty, meaning they are completely screwed. The crux of that post on the Apple Discussions board was to get Apple to own up to an obvious product defect and offer some kind of recall to address the issue, as it is quite obviously a design and/or production flaw. There was also a link to an online petition to do precisely that, which I'll include the link to here: http://lowermemoryslot.editkid.com/ (nearly 200 signatures at the time of this posting) As far as Apple's forum is concerned, they can moderate it as they wish, but it certainly isn't reassuring that the lower RAM slot/post-10.3.8-Al-PBook issue has not been formally acknowledged as of yet, but the thread has been dutifully collapsed. I guess I'll be forced to buy AppleCare before my year ends in February 2006, because with the current ineffective correction of new MLB every time it goes bad, I know I'll need servicing. Right now I am averaging a new MLB every three months, with two weeks of downtime with every repair. That is already one month of shop time for six months of ownership. If you have been a victim, please post and be counted. If you are running an AL PBook with 10.3.9 or better, better look closely for that power button light, listen carefully for that boot chime and check "About This Mac" any time your system begins to feel a bit sluggish to see if all your RAM is actually working for you. PS: If there are any DashBoard programmers out there, I think it would be absolutely hysterical to have a "RAMSlotWatcher" widget--one that flashes and beeps when your lower RAM slot fails, and autogenerates a feedback email to Apple for the issue!