Hi Folks, I've been getting a progressively worse issue where ~24 hours purple and green corrupted characters appear on screen and OSX (Mountain Lion) eventually hangs. This is a mid 2010 iMac with 8gig memory 27" Mid 2010 iMac Processor 2.93 GHz Intel Core i7 Memory 8 GB 1067 MHz DDR3 Graphics ATI Radeon HD 5750 1024 MB I did get the hard drive recall notice so wondering if that is the cause? Anyone else seen something similar? Screenshot attached. Many Thanks in advance. Adam.