The following code is intended to slowly, continuosly fade in and out the “Wax and wane” writing below.
It mostly works as intended, but it also produces occasional errors on the Firefox 3.5.8 error console. Also verified with Firefox 3.0.11.
The problem does not seem to occure if the duration value is set to something much shorter.
The error seen (translated from German): “Error processing the value for 'opacity'. Declaration ignored.”