The RadSlider is getting a subtle, but still important update for its visual appearance in the Q1 2010 release of RadControls for ASP.NET AJAX. We made the appearance of all skins be consistent so you can have more choice when it comes to picking the right one for your application.
Here is the comparison between the old an new look:
The first difference is that we have added a border at both ends of the slider track. The border is not part of the track itself. The second difference is that all slider arrows now have a background and look like buttons.Finally, the drag handle orientation on some skins has been changed. The slider will now actually point the drag handle depending on where you put the track (TrackPosition property).
We hope that these changes will improve the usability of the control and make it easier to integrate with other controls in your application. If you wish to upgrade to Q1 2010, but keep the old look, then you can simply set the slider properties EnableEmbeddedSkins and EnableEmbeddedBaseStyleSheet to false and load the Q3 2009 skin and base stylesheet manually on the page. Click here for a sample page that shows how to do this (using the old Default skin).