i've just upgraded from jquery-ui-1.8rc3 up to jquery-ui-1.8.6. I've designed a custom theme with the theme designer.
Now my used sliders didn't look correctly. Please see the image.
I've solved this on my own with copying the slider js-function from 1.8rc3 into the js-file from 1.8.6 which was much longer. I don't know, whats the real problem is, but now it works for me.
That's the same slider with the slider-function from 1.8rc3.