This is an awesome plugin. No more worrying about 3 different css shadow techniques for cross browser compliance or using images for shadowing.

Drop Shadow Plugin at jQuery.com

The only issue that I find is in Safari where sometimes the shadow does not take up the cordinates that you specifed for it. Example is by writing "$('.myDiv').dropShadow({left:6, top:6, blur:2});" you might find that safari will set the top to -6. Refreshing the page will sometimes fix this, are we supposed to tell our users to do that? I think not. But this Safari glitch is noted in documents for dropShadow and so they suggest you toy around with it a bit to find the fix.

One feature that I really like is with shadowing images. The default shadow color for dropShadow is black, but now for images. The shadow will actually use the colors of the image. Very cool for styling. At least this happens with jpegs and pngs. I haven't tested gifs yet.