Hi Dan,
Thank you for reporting this problem! It is due to incorrect positioning of the colorpicker dialog in RTL mode because of the negative value of the left property, e.g.
As a workaround you can apply the following CSS class:
<style>
.rcpPalette {
left: 0 !important;
}
</style>
<telerik:RadImageEditor RenderMode="Lightweight" runat="server" ID="RadImageEditor1" Skin="Telerik" ImageUrl="~/ImageEditor/images/addtext.jpg" CanvasMode="No" Width="640" Height="360" />
Best Regards,
Rumen
Progress Telerik