Hello All, I recently had my old "T" style magsafe adapter switched out by Apple for a new "L" style magsafe adapter. Since I began using this new adapter, I have been having a problem that occurs randomly. (I am using a 2007 MBP 2.33 GHz Core 2 Duo with 4 GB of RAM). Every 2 - 3 days, the magsafe light will start to flicker and turn on and off, about every 5 seconds or so. Also, the charging indicator switches back and forth between "plugged in" and "battery power". After going back and forth for about 15 to 20 minutes, the computer will either turn off or restart itself. The only temporary remedy I can seem to find is to leave the computer off and let it sit until it is cool to the touch, and then resume using it. This usually makes it last another 2 - 3 days before having the problem again. It's pretty annoying because it basically interrupts my work for about 30 minutes while the computer cools off. Also, I never know when it's going to happen, so I feel like I'm walking on eggshells when using the computer. I'm about to run the "Apple Hardware Extended Test" from the install disc and see if that turns up anything, but it seems like it is a problem with the charger working properly with my old MBP. Maybe the new charger isn't meant to be used with a 2007 MBP? I say this because I never once had a problem for 3 1/2 years using the old "T" style magsafe adapter. I called Applecare and all they would tell me is to run the hardware test or take it to an Apple Certified Technician. Anyway, I'll post back here if I get anything conclusive from the hardware test. If anyone knows anything or has any ideas, I would really appreciate hearing them! Thanks, steiney UPDATE: I just finished running the Apple Hardware Test and it said there were no problems. I really think it must be a problem with the new style charger working with an old Macbook Pro. I really wonder if anyone else with an old Macbook Pro has had this problem. UPDATE 2: I just finished reading about posts from about 100 different people on Apple support site that are having the exact same problem. It seems that Apple designed the new charger in such a way that it doesn't perfectly fit the older Macbook and Macbook Pro models. Pretty terrible quality control on Apple's part. I'm pretty disappointed with them. If it weren't for the fact that the only alternative to Apple is Microsoft, I would strongly considered buying a different brand for my next computer. The thing is, Apple is very well informed about the problem. They have just decided to ignore it and hope that it goes away. That's the kind of thing I would expect from Microsoft or a PC manufacturer, not from Apple.