The most common symptom seems to be incredibly slow Flash video playback, but people are also claiming that there's a bug forcing the hard drive to spin down, that there's a corrupted Snow Leopard build preinstalled, and even that the problem is bad permissions, which is basically how an OS X user gives up trying to figure things out.
Performance issues with new 27-inch Apple iMac
Posted on Friday, October 30 2009 @ 18:59 CET by Thomas De Maesschalck
Engadget reports quite a number of owners of the new 27-inch iMac systems from Apple are complaining about performance issues.