Adding ImageEditor inside a RadPanel breaks the RadPanels designer. The problematic behavior can be observed with the following configuration:

        <telerik:RadPanelBar ID="RadPanelBar1" Runat="server">
            <Items>
                <telerik:RadPanelItem runat="server" Text="Root RadPanelItem1">
                    <ContentTemplate>
                        <telerik:RadImageEditor ID="RadImageEditor1" runat="server" ImageUrl="~/Images/Jellyfish - Copy.jpg"></telerik:RadImageEditor>
                        <asp:Button runat="server" ID="dasd" />
                        <telerik:RadEditor ID="RadEditor1" runat="server"></telerik:RadEditor>
                    </ContentTemplate>
                </telerik:RadPanelItem>
            </Items>
        </telerik:RadPanelBar>

Images bigger than 10MB cannot be saved if the ImageEditor is used in enabled CanvasMode, even though the MaxJsonLenght property is configured. The ImageSaving event handler is also never called.


The only possible workaround for the moment is using the ImageEditor in disabled CanvasMode (CanvasMode="No")

When the CanvasMode of the ImageEditor is enabled, the JPG images are saved as PNG.

Steps to reproduce:

1. Open the following online demo: http://demos.telerik.com/aspnet-ajax/imageeditor/examples/canvassupport/defaultcs.aspx

2. Use the configurator above the ImageEditor to enable the CanvasMode

3. Save the image, choosing the "Download image" option

4. The image, which original format is JPG is saved as a PNG (with increased size)

A video, demonstrating the issue is available here: http://screencast.com/t/FL3Gs6soz7F

When a big image(~3MB) is loaded into the ImageEditor ( with enabled CanvasMode) sometimes the image is not loaded into the controls or the whole page crashes. The issue could be reproduced in Google Chrome, with the 2013 Q1 SP1 version of the controls.

After the LIB (2013.1.423) the Save (on server) functionality of the ImageEditor doesn't work properly and throws a javascript error.