Hi All, I have had my 24" iMac since July '08 and never had any issues. Over the last week I have had severe hanging issues and delayed "beach-ball" appearances that eventually clear, sometimes after a few seconds, sometimes it take minutes. It seems to worse in the afternoon, after being used for the day. I am getting a "Debugger () was called!" message in my console frequently. Yesterday afternoon it was so bad that I had to press the power button to reset and it took ages to re-boot after powering back up. Does anyone know of any diagnostic software to see if I can narrow my problem down to Hardware or Software issues? Any other help would be appreciated too. Thanks in advance.