489
edits
Changes
Added work-around link.
Although we were initially suspicious of a hardware problem, performing a safe boot (boot with shift-key down) eliminates the problem. Further investigations revealed that the problem only occurs when Quartz Extreme is enabled (via System Profiler). Quartz Debug (/Developer/Applications/Performance Tools) can be used to manually enable/disable Quartz Extreme.
Although we were initially suspicious of a hardware problem, performing a safe boot (boot with shift-key down) eliminates the problem. Further investigations revealed that the problem only occurs when Quartz Extreme is enabled (via System Profiler). Quartz Debug (/Developer/Applications/Performance Tools) can be used to manually enable/disable Quartz Extreme.
One possible work-around is to use the [http://www.macosxhints.com/article.php?story=20040724190553112&query=rtz Disable Quartz Extreme Hack].