Commented Unassigned: Could not load control AjaxControlToolkit.HTMLEditor.Samples.Lite [27492]

I have a problem with HTMLEditor.Editor with the version of July Version 7.0725 .NET 4.0
With previous versions everything was ok!

With or without AjaxControlToolkit.config

<controlBundle name="HTMLEditor">
<control name="HTMLEditor"></control>
</controlBundle>

There is the full exception stack:

[Could not load control AjaxControlToolkit.HTMLEditor.Samples.Lite. The script reference(s) of this control was not loaded correctly. If AjaxControlToolkit.config is used, probably this control is not registered properly.]

[Exception: Could not load control AjaxControlToolkit.HTMLEditor.Samples.Lite. The script reference(s) of this control was not loaded correctly. If AjaxControlToolkit.config is used, probably this control is not registered properly.]
AjaxControlToolkit.ToolkitScriptManager.OnPreRender(EventArgs e) in f:\TeamCity\buildAgent\work\80acd78aa4c25314\Server\AjaxControlToolkit\ToolkitScriptManager\ToolkitScriptManager.cs:257
System.Web.UI.Control.PreRenderRecursiveInternal() +83
System.Web.UI.Control.PreRenderRecursiveInternal() +168
System.Web.UI.Control.PreRenderRecursiveInternal() +168
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974

Help Me Please.
Thanks in advance.
Comments: It's a larger issue, with HTMLEditor being silently dropped from the sample site as well. Not only this breaks compatibility with legacy projects (and projects using AjaxControlTookit are usually not new), and HtmlEditorExtender is not a drop-in replacement. For example, because it's not IFRAME-d, user-provided styles in the HTML text apply to the WHOLE page, rather to only to editor. There are workarounds, and some browsers support <style scoped>, but it's an issue.