OK, So I'm noticing heat issues with my 4400+ recently. It started idling at 37*C when it usually averages 31-32. I turn it off and give the cooler a wiggle. It pops off like it wasn't clipped in properly. There is no damage or shearing on my motherboard's heatsink mount and the heatsink's bracket isn't bent or damaged. I'm using the Arctic Freezer 64 Pro. I've had this one running problem-free for almost a year. I'm guessing I just got lucky that it didn't pop off during operation. Any tips on seating the heatsink properly without smearing around thermal paste? I found that I have to hook in one side of it and carefully use a screwdriver to pop the other side on. Then I just close the lever. This gave me solid cooling for about a year. But I would like any other's method.