We are not aware of any problems with displaying the RadSlider under IE 10 and Chrome. I am afraid that the provided information is not enough to determine what the exact problem is. Please, send a fully working project and step by step instructions for replicating the problem. If needed a video demonstrating the issue as well.
As for the issues with the RadButton and RadComboBox, I would suggest opening separate support tickets for each of them and including enough information for reproducing them so that we can inspect the cases locally.
the Telerik team
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