1) The ribbon does not support RTL mode, nor it will provide in the near future. The main reason for that being that there is no specification from Microsoft. (Or put correctly, the MS specs explicitly says that the ribbon does not work in RTL)
2) Indeed. Many of the controls detect if a page is in RTL mode and apply the styles to the control. Yet, if a control is explicitly set to be RTL it may look RTL before the page is fully loaded and you will not get the ugly flickering.
3) For that question, I will assign the ticket to the appropriate person.
the Telerik team
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