This can happen, in case you have defined your slider controls in an initially invisible element - that is, an element with display:none style setting. In case my assumption is correct, then you need to call the repaint
client-side method of the slider controls as soon as that invisible parent becomes visible. For all supported browsers but Safari and Chrome, we have handled this scenario in the code of RadSlider. However, this is not possible for those two browsers.
Another reason for this result, can be a JS error that you get only in Chrome. Please check for JS errors - in case there are, the slider should show as expected once you fix the errors.
In case my assumptions are not correct, please send me a running project that demonstrates the problem and I will check what causes it.
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