It will be great if the Chart Label has hyperlink facility....

Make the grid reactive, in that when the window gets small enough(mobile size),  a possibility could be to have one total column. So instead of a row having 4 columns, each row would have 4 subrows; i.e., it would look more like a treeview. 

Of course we all want folks to buy Kendo (to support further development) but even as someone with a licence to the product (as part of my Ultimate Collection) I am often prevented from using KendoUI with clients by the licensing confusion that is the GPL.

My clients understand that t is covered by my commercial license to code for them, and they can use it royalty free. The problem is int he future and ongoing compliance. What they absolutely do not want is to have to make sure any dev who will ever touch that code in the future is ALSO a telerik licensee. It is simply too much to keep track of for a UI toolkit.

You will sell more copies and greatly improve the ability of your evangelists to get Kendo into the market if you move to a significantly more client friendly license.

Throughout the examples/docs for the KendoUI Window component, a variable named 'window' is used to reference the component. This is a terrible pratice, because the variable masks the global window object and prevents the script from acessing it further. As your examples are often used as a starting point for custom solutions, you should rename the variable into something like kWindow or similar. 

Its very important to have dynamic binding in the Tree view. Many users are changing the control from Kendo and using other controls because of this. Many large organisations have this problem and both of user and developer is loosing the opportunity to use it.

The Kendo UI Forums have limited usefulness, do not seem to be consistently monitored for new questions, there isn't a useful tagging or categorization structure.  The search engine does a poor job of identifying similar questions / answers.  There is no easy way to link Questions together and/or mark duplicates.  The Forum site goes down from time to time, given the extremely limited documentation, this leaves developers without reliable information readily available.

All of these shortcomings (which are more than adequately addressed by Stack Overflow) result in a fractured support and documentation infrastructure for Kendo UI.  

Migrating all unpaid support away from the forums to Stackoverflow will dramatically improve the experience.

Add support for intellisense, auto-complete and syntax-highlighting to the editor. This enables the editor to be used for writing code or script. The intellisense and auto-complete rules should be customisable and support Ajax callbacks to populate.

Examples:
CodeMirror: http://codemirror.net
Brackets: https://github.com/adobe/brackets
Cloud9 Editor: http://ace.ajax.org

A gantt chart would be a nice addition to the too lset.

Add a new feature to easily export/import current grid settings, such as the column size, page index, page size, column index, etc. This is useful for saving/restoring individual user's custom grid.

This can be added to other databound widgets, too, such as the ListView.

Based on this thread that I created: http://www.kendoui.com/forums/ui/grid/save-load-grid-settings.aspx

It would be very helpful it there is an option to hide spin controls on numeric controls. Spin control are not really useful in all cases. Also setting readonly property for the control has no effect on the spin control you can still update the value by clicking the spinner. Currently in the forum a workaround was suggested using css (http://jsfiddle.net/krustev/uZUjK/). Implement this as a property for the numeric control

I have a grid column being bound to an object.  I would like to be able to filter this column on a sub-property of the object that it is bound to.  In my example I have an object called Division, and I would like to be able to filter on Division.Name.  Currently the filter controls all show up blank when used against an object-typed column.

Please add the following things in Kendo UI
validators for compare, password length check, password complexity check, RangeValidator, ValidationSummary

It would be very useful feature to Enable / Disable Panelbar Item

would be great to have the option to set an image in a datagrids title, or alternatively be able to specify a title-template (like row-template but for headers)

would be great to be able to set the datasource of a grid to xml (or mvc 4 data).

it would be nice to be able to user-resize the columns with the mouse (like in jQuery-Grid Add-On).

The ability to specify the width of the Ranges in a radial gauge would be beneficial to customize how the gauges can be displayed

Add a new Kendo UI component to display a record vertically (Or add an option to the existing grid to change the orientation of the records).

Usually, I was using vertical grid to display a single record but some people might need it to display more than one record (ex: when you compare items on best-buy web site)

The vertical grid could also be used as a property grid (http://www.telerik.com/products/silverlight/controls/propertygrid.aspx).

Hey,
I am not sure, if it is a bug, or if I am just wrong, but I tried this:

    $(".DatePicker").kendoDatePicker();
    $(".DatePicker").data("kendoDatePicker").enable(false);
    $(".NumericTextBox").kendoNumericTextBox();
    $(".NumericTextBox").data("kendoNumericTextBox").enable(false);

This works fine for all DatePickers, but on NumericTextBoxes it thows an exception ("object is null or undefined"). Using ids to enable/disable NumericTextBoxes works though.

I like the Wpf/Silverlight version. But it should be possible in HTML also: Telerik has in the ASP.NET for Ajax a RadDock. Can we have something like this sort of MDI interface in Kendo