In the meantime, use the following workaround:

<script type="text/javascript">
                var designMode = Telerik.Web.UI.EditModes.Design;
                var editorPrototype = Telerik.Web.UI.RadEditor.prototype;
                var keypress = editorPrototype._keyPressHandler;
                editorPrototype._keyPressHandler = function (ev) {
                    if (this.get_mode() == designMode) {
                        keypress.call(this, ev);
                    }
                }
                var keyDownOverride = editorPrototype._keyDownHandlerEnableTrackChangesOverride;
                editorPrototype._keyDownHandlerEnableTrackChangesOverride = function (ev) {
                    if (this.get_mode() == designMode) {
                        keyDownOverride.call(this, ev);
                    }
                }
                var keydown = editorPrototype._keyDownHandler;
                editorPrototype._keyDownHandler = function (ev) {
                    if (this.get_mode() == designMode) {
                        keydown.call(this, ev);
                    }
                }
            </script>

Using the RadEditor with Auto or Mobile mode in a RadWindow is impossible because JS error are thrown when dialog is shown. 

For the time being, the most proper solution for this case is using the Lightweight mode for RadEditor.

I would like to see a new control, a Submit button, that when added to a web form would act not only as a Submit button but also have the functionality to provide a warning message with options when the user attempts to exit a form on which changes have been made yet not saved, activated by the windows beforeunload event.

When adding the new Submit button to a form options/properties would be available to the developer to select all or specific controls on the form to check for changes. The developer would also have the option of providing the warning message to be displayed as well as being able to title the buttons of the warning message as appropriate, i.e. "Leave without Saving Changes", "Stay on Page and Save Changes".

If the user presses this "Submit" button all the "data changed" flags would be cleared and the beforeunload event will be cleared allowing for redirection or further processing.

Since we as developers want to provide the best possible experience for our web users, this type of control would be invaluable in making the user experience easier and less frustrating. In addition it would save many hours of coding by encapsulating this type functionality in a single control that can be inserted in place of the standard Submit button making it easier and more convenient for a developer to provide professional data forms to users tailored to the specific type of data gathering that the form is being designed for.

I know that there are many jquery/javascript functions that perform similar functionality, but it would be so much more convenient if a Telerik control existed that would perform these functions.

For the time being you can manually set the localization string for the "Add Custom Color" and "Current Color" buttons: 
		<telerik:RadEditor ID="RadEditor1" runat="server" RenderMode="Mobile" Language="de-DE" LocalizationPath="~/App_GlobalResources"></telerik:RadEditor>
		<script>
			var initialize = Telerik.Web.UI.Editor.MobileColorPicker.prototype.initialize;
			var addCustomColorTextLocalized = "Add Custom Color Localized";
			var currentColorTextLocalized = "Current Color Localized";

			Telerik.Web.UI.Editor.MobileColorPicker.prototype.initialize = function () {
				var colorPicker = this;
				initialize.call(colorPicker);
				
				colorPicker._addCustomColorText = addCustomColorTextLocalized;
				colorPicker._currentColorText = currentColorTextLocalized;
			}
		</script>

We are currently using v2010 of telerik.web.ui dll in our production environments and planning to move to 2015 very soon. Upon updating in our staging environments we are seeing a massive difference in dll size between the 2 versions. Also the webresource.axd(javascript) in the new version is 1.14MB in size which may cause some performance issues. My question is:

1. Is there a way to reduce this size or do per-need basis loading?
2. Can we refer telerik js files in our master page so that they are not loaded all the time? If so, please let us know how.

http://demos.telerik.com/aspnet-ajax/editor/mobile-examples/overview/default.aspx

Error: Uncaught TypeError: Cannot read property 'Polling' of undefined

We're using Telerik.ReportViewer.WebForms.ReportViewer for exporting to another files format but only exported to excel file I got error message below.

please help to advise for this error.

Server Error in '/' Application.
Attempting to get range {22,19}{10,3},Merged=False,Parent=printPackingList2[0], that intersects with an already merged range.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: Attempting to get range {22,19}{10,3},Merged=False,Parent=printPackingList2[0], that intersects with an already merged range.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace: 

 [InvalidOperationException: Attempting to get range {22,19}{10,3},Merged=False,Parent=printPackingList2[0], that intersects with an already merged range.]
   Telerik.Reporting.Excel97.Worksheet.GetRange(Int32 col, Int32 row, Int32 colSpan, Int32 rowSpan) +186
   Telerik.Reporting.ExcelRendering.Excel97.Worksheet.Telerik.Reporting.ExcelRendering.IWorksheet.GetRange(Int32 col, Int32 row, Int32 colSpan, Int32 rowSpan) +73
   Telerik.Reporting.ExcelRendering.RenderingItem.GetRange(IWorksheet worksheet, TableLayoutInfo layoutInfo) +381
   Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo) +78
   Telerik.Reporting.ExcelRendering.RenderingItemContainer.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo) +141
   Telerik.Reporting.ExcelRendering.Section.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo) +62
   Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo) +638
   Telerik.Reporting.ExcelRendering.RenderingItemContainer.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo) +141
   Telerik.Reporting.ExcelRendering.Report.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo) +786
   Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo) +638
   Telerik.Reporting.ExcelRendering.Report.Render(IWorkbook workbook) +373
   Telerik.Reporting.ExcelRendering.Excel97.ExcelReport.Telerik.Reporting.Processing.IRenderingExtension.Render(Report report, Hashtable renderingContext, Hashtable deviceInfo, CreateStream createStreamCallback, EvaluateHeaderFooterExpressions evalHeaderFooterCallback) +184
   Telerik.Reporting.Processing.ReportProcessor.RenderCore(ExtensionInfo extensionInfo, IList`1 reports, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback) +1386
   Telerik.Reporting.Processing.ReportProcessor.RenderCore(String format, IList`1 reports, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback) +103
   Telerik.ReportViewer.WebForms.ReportExportOperation.RenderReport(String format, IList`1 processingReports, Hashtable deviceInfo, IRenderingContext renderingContext) +259
   Telerik.ReportViewer.WebForms.ReportRenderOperation.PerformOperationOverride() +340
   Telerik.ReportViewer.WebForms.HandlerOperation.PerformOperation(HttpContext context, ICacheManager cacheManager) +74
   Telerik.ReportViewer.WebForms.BasicHandler.ProcessRequest(HttpContext context) +276
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +341
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

When selecting a table element in the content area via the Dom inspector, Delete Table does not remove the table. 

You can use the RemoveElement from DOM inspector as a temporary workaround.

Currently, opening the CustomColorPallete popup always selects the #808080 color.

To have this behavior use the custom code solution below:

<telerik:RadColorPicker runat="server" ID="RCP" EnableCustomColor="true" OnClientLoad="OnClientLoad" />

<script>
    function OnClientLoad(sender, args) {
        $telerik.$(sender._customColorButton).click(refreshPalette(sender));
    }

    function refreshPalette(sender) {
        return function (evt) {
            var colorPicker = sender;
            var selectedColor = colorPicker.get_selectedColor() || "#808080";
            colorPicker._updateHslPaletteElementsUI(colorPicker._getRgbFromHex(selectedColor), null, true);
        };
    }
</script>

For the time being you can safely use the same scenario with ContentAreaMode set to Div.

For all controls that have a dropdown, there should be a DropDownSettings part.

Namely, it should control: width, height as well as their min / max counterparts and css class. Perhaps z-index

There are several other suggestions along these lines, but in general, Telerik needs to make their data input controls more consistent in the implementation of a "Label" property. Without such consistencies, it makes including controls that have this property and those that don't together on the same page much more difficult. As of the writing of this, the DropDownList and DatePicker controls do not have a Label property. There is no apparent reason why this should be so.

All of the input controls should have this property.

Related requests:

http://feedback.telerik.com/Project/108/Feedback/Details/149658-add-built-in-label-to-control

http://feedback.telerik.com/Project/108/Feedback/Details/66117-add-label-property-to-ajax-raddatepicker

Related annoyed forum thread about the omission of this property in the DropdownList control:

http://www.telerik.com/forums/dropdownlist-label#TI3zWYeMFESXjPIY_bYjZg

The editor does not go to edit mode. The problem occurs also when Auto mode is used. This prevents the developers to rely on the AutoResizeHeight functionality when a mix of all rendering modes is required. 

Possible workaround is to use the RadDeviceDetectionFramework - http://docs.telerik.com/devtools/aspnet-ajax/controls/raddevicedetectionframework - and programmatically disable the AutoResizeHeight in mobile devices:

ASP.NET
<telerik:RadEditor ID="RadEditor1" runat="server" RenderMode="Auto"
    AutoResizeHeight="true">
    <Content>
        <p>editor</p>
    </Content>
</telerik:RadEditor>

C#
using Telerik.Web.Device.Detection;

public partial class Default : System.Web.UI.Page
{
    private void Page_Load()
    {
        if (Detector.GetScreenSize(Request.UserAgent) < DeviceScreenSize.Medium) {
            RadEditor1.AutoResizeHeight = false;
        }
    }
}

There is a missing label in the Box tab (Width and Height options) in the StyleBuilder dialog.

You can dynamically change the label by following this example:

<telerik:RadEditor runat="server" ID="RadEditor1" OnClientCommandExecuted="OnClientCommandExecuted">
    <Tools>
        <telerik:EditorToolGroup>
            <telerik:EditorTool Name="StyleBuilder" />
        </telerik:EditorToolGroup>
    </Tools>
</telerik:RadEditor>

<script>
    function OnClientCommandExecuted(sender, args) {
        var command = args.get_commandName();

        if (command === "StyleBuilder") {
            var dialog = sender.get_dialogOpener()._dialogContainers[command];

            dialog.add_pageLoad(fixSectionName);
        }
    }

    function fixSectionName(sender, args) {
        var dialogWin = sender.get_contentFrame().contentWindow;
        var label = dialogWin.$telerik.$(".reStyleBuilderBoxSize").find("legend");
        label.html("Dimensions");
    }
</script>