I was once again reminded of an IE6 bug I had forgotten about - background images flashing or flickering when the mouse hovers over them.

So, I went looking for a solution. Here's what I found:

try {
  document.execCommand("BackgroundImageCache", false, true);
} catch(e) {}

Works like a charm. Turns out it's due to the browser not caching the background images. This command turns on background image caching.

Do you think this would be good code to add to the core jQuery library?