Thank you for contacting us. Would you be more specific on that issue? We need to know which controls exactly are having some issues. Also it would be good to provide us code, screenshots, runnable project and everything that you think would give us more information about the issue, so we would be bale to investigate it.
By the provided information I would think that this is related to a custom skin issue and a control that have some breaking change (HTML/CSS rendering) in the base stylesheet, and that`s why it does not work with the version you have downloaded, but with a previous ones. Which is the latest version that works fine with your custom skin?
You could try to recreate the custom skin for the exact control using the template from Telerik.Web.UI version 2011_1_519
and to check if it will work correctly. If it works, then you should check if your custom skins need to be reworked accordingly to the latest changes and improvements.
the Telerik team
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