Small dot appears in upper left corner of the slider in Firefox 3

Whenever you move a handle,

This has to do with accessibility options putting a dotted outline around the anchor link that gets focus.

I resolved this issue in my local copy by changing the following line:

.wrap('<a href="javascript:void(0)" style="cursor:default;"></a>')

to:

.wrap('<a href="javascript:void(0)" style="cursor:default; outline:

none;"></a>')

These glitches also appear in the demos for the sliders on jquery.com

http://dev.jquery.com/view/tags/ui/1.5b2/demos/ui.slider.html

Notice the little blue dot when you drag a handle.