flash actionscript: I keep on getting this error message. If I publish the file twice, it is ok.

..\Local Settings\Application Data\Macromedia\Flash
8\en\Configuration\Classes\FP8\System\capabilities.as: Line 7: The name of this
class, 'System.capabilities', conflicts with the name of another class that was
loaded, 'System'.
{

running Flash 8 on windows, although this occurs on the Mac too. Any help
would be appreciated. I googled for this problem and found another unsolved
case: http://www.actionscript.org/forums/archive/index.php3/t-86822.html