Created Issue: HTMLEditor is not W3C compliant [27120]

I noticed some errors with the HTMLEditor element and the W3C validator.
My configuration is :
- Firefox 10.0.2
- AjaxControlToolkit 3.5.51116
- Doctype XHTML 1.0 Transitional

For example, we can see with W3C validator :
- duplicate specification of attribute "border"
- there is no attribute "marginHeight" / "marginWidth"
- there is no attribute "tabindex"
- duplicate specification of attribute "id"
- element "nobr" undefined
and many others errors...

With source code, I was able to compile a new dll with some changes in :
HTMLEditor\Popups\OkCancelAttachedTemplatePopup.cs (line 77)
HTMLEditor\Popups\LinkProperties.cs (line 80)
HTMLEditor\Popups\LinkProperties.cs (line 131)
HTMLEditor\Popups\PopupBGIButton.cs (line 83)
HTMLEditor\Popups\AttachedTemplatePopup.cs (line 135)
HTMLEditor\Popups\BaseColorsPopup.cs (line 84)
HTMLEditor\Toolbar_buttons\SelectButton.cs (line 101)
HTMLEditor\Popups\Popup.cs (line 259)
HTMLEditor\Toolbar_buttons\FixedColorButton.cs (line 78)
HTMLEditor\EditPanel.cs (line 616)
And now, the HTMLEditor is W3C ready.
In attached file, you can see my HTMLEditor folder with my changes (search TODO tag).

Can you see for a W3C compatibility with the HTMLEditor object for a next version ?

Thanks.