At least some of the CSS for mp3-jplayer 1.4.3 references .png files instead of .gif files, even though a .gif is in the /images directory. For instance:
mp3jplayer-blu-sidebar.css, this line appears:
background: transparent url('images/pos-handle40.png') no-repeat 0px top;
But in the /images directory, the file is
You should probably fix this, either by changing the CSS to refer to .gif files, or by substituting .png files for the .gifs.
I do not know how widespread a problem this is. You will need to check all of your CSS. Please let me know when you've fixed this so I can run
svn update to get a corrected version of the plugin.
Thanks! Great plugin!