Dozens of owners of Apple’s new 27-inch iMac are reporting performance issues ranging from sluggish Flash playback, erratic hard drive behavior and buggy operating system installations.

The most common complaint seems to revolve around poor Flash performance, whereas videos play back very choppily and appears to cause CPU spikes. The YouTube video below attempts to document the problem.

Some customers complaining in Apple’s support forums also claim there’s a bug forcing the hard drive to spin down, while others have complained their iMacs shipped with a corrupt Snow Leopard installation.

Apple began shipping the 27-inch iMac on Oct. 20. The all-in-one desktop costs $1,700 and includes a 3.06GHz Core 2 Duo processor.

Having problems with your shiny new iMac, too? Report your issues in the comments below.

Via Engadget