When the data set is changed and the chart is redrawn there should be an option to move from the current values to the new values. Like it already exists on the gauge charts. But what about a line chart with ever changing values? 

Explain the characters used in a date format string, or at least describe to what standard they are evaluated.

Support of KendoUI for Mobile Grid controls with sorting,filtering,paging options

I have two kendo grids. Parent grid contains rows with data to request.  When the numerictextbox is triggered with a spin or change that row is added to another grid (child grid) with the number from the parent numerictextbox in the child numerictextbox.  However... after several triggers... the spin action starts to add two instead of one.  Has anyone had this issues? any work arounds?

imageBrowser: {
				messages: {
				 dropFilesHere: "Drop files here"
				},
				transport: {
					read: "/content-page-generator/image-browser?act=read",
					destroy: {
						url: "/content-page-generator/image-browser?act=destroy",
						type: "POST"
					},
					create: {
						url: "/content-page-generator/image-browser?act=create",
						type: "POST"
					 },
					thumbnailUrl: "/content-page-generator/image-browser?act=thumbnail",
					uploadUrl: "/content-page-generator/image-browser?act=upload",
					imageUrl: "http://images.xxx.com/{0}"
				}
			 }

This is a part of my javascript code from Kendo.But the Kendo "kendo.all.min.js" formatting my link.We needn't formatting images src.
error:
return r&&"f"===r.get(A)?(e=i(n.path(),r.get(S)).replace(_,""),o&&(e=v(o)?o(e):c.format(o,encodeURIComponent(e))),e):t},
change:
return r&&"f"===r.get(A)?(e=i(n.path(),r.get(S)).replace(_,""),o&&(e=v(o)?o(e):c.format(o,decodeURIComponent(e))),e):t}, 

The grid should work correctly when grouping large datasets.  Currently the grid does not always display all of the groups.  IN addition groups come in and out of existence when you scroll.  It seems kind of strange that it supports grouping but doesn't work correctly in a real world scenario

kendo.format("{0:#,##0.######}", 4.336808689942018e-22)

This will throw an error: RangeError: toFixed() digits argument must be between 0 and 20

This appears to be a bug inside the format function.

Currently if you drag weekly event from Tuesday to Wednesday for example and change to edit series it is not being changed to Wednesday. It stays on Tuesday. I think most of people would expect it to be rescheduled for Wednesday.

Problem:
the same CSS classes are used for styling of different widgets, hence when they nest, styles interfere.

Example:
MultiSelect in a Grid column filter. The filter form is placed in the column menu and menu item styling (.k-filter-menu .k-button) is propagated to all k-buttons in it, including MultiSelect's selected item tags that are also k-buttons and have styling with lower specificity.

Solution:
Use additional CSS classes for specific styling. That is .k-button is Ok for generic styling (color, border, hovers), and another, say .k-item-tag and .k-menu-item, for widget specific (margin, width etc.)

There is no pure HTML5+JS equivalent for RadSpell available anywhere that I can find. We currently use RadSpell but are trying to move away from WebForms. RadSpell is holding us back.

Would like to have a splitter in mobile controls.

Setup: 
* KendoUI Community Edition v2013.2.716
* Multiple resources in event

When Field in Event contains Array of guids - it shows fine in the event, but on grouping throws an error (as guids are treated incorrectly in filtering function)
When guid is wrapped by '', then grouping works well, but Event do not show assigned resources...
Using debugging I found that problem is in filtering (Piece from the code): for(r=a.filterExpr(e),s=r.fields,d=r.operators,o=c=Function("d, __f, __o","return "+r.expression),(s.length||d.length)&&(c=function(e){return o(e,s,d)}) 

line 26486 
has this:
data = extend({}, { field: group.field, value: group.value }, group.aggregates[group.field]),
should be this:
data = extend({}, { field: group.field, value: (typeof(group.value) === 'undefined' ? null : group.value) }, group.aggregates[group.field]),
Or something like that.  In any case, without that change, the following will blow up when cell value is undefined.
groupHeaderTemplate: "#=value#"

accordion widget is missing. please add it

Chrome displays a vertical scrollbar for all kendo window using iframe. Example:
http://jsfiddle.net/Vz2Z4/

kendo will be more beautiful if kendo add a scrollbar plugin, and use it in some other widgets(DropDownList, MultiSelect, and so on); and I find something that I think it's not pretty: the grid widgets in metro theme, when I click the head of the grid, the order icon is not display immediately.

Is there some way to flash(refresh) one of the nodes in the "TreeView" widgets?

And how can I change the attr of the node easily?

Grid drop down does bind when its data contains '

when drop down bind to item that contains ' it does not work

When we resize the browser, the window should center.

Development of a Kendo IDE

Has Telerik/Kendo plans to develop its own IDE?  A Wakanda-like IDE, with both design and source mode possibilities, would be very welcome and will give Kendo a real (commercial) boost!