I was using a nice new jQuery slider plugin called Nivo Slider when I encountered a bug that caused the captions to flash on and off after the page had been idle for a while. The effect is very similar to the blinking effect from the old HTML blink tag.
The solution I found is this. If you have the expanded version of the plugin, go to line 108 and change
nivoCaption.fadeOut(settings.animSpeed);
to
nivoCaption.hide();