Bullet and numbered lists are still displayed as toggled in the ribbon even though the user has broken the lists. The toggle is removed only when the user clicks over the document.

When an HTML document contains a div and a span just after it, the span is imported as a child of the div. As a result, the span inherits some of the settings applied to the div.

In this example, the current synchronization context is "occupied" by the task that sets the RTF string forcing the arrange tasks to wait for it to complete before they can start. However, it can never complete as it is blocked by the wait call for the arrange tasks that will never run, causing a deadlock. 

System.InvalidOperationException: Cannot use a DependencyObject that belongs to a different thread than its parent Freezable. is thrown when multiple RadRichTextBoxes are instantiated in different STA threads. The cause seems to be a static freezable resource.

Add ability for Import/Export of custom attributes to HTML.

Create different options for pasting(keep formatting, merge formatting, use destination styles). At this point, the document default styles are not copied in the document fragment, thus their loss is observed. 

When DocumentInheritsDefaultStyleSettings is true and the font settings are like set to different font size/font family, copied text is pasted to MS Word with Verdana font, size 12. Loss of formatting is also observed when copying from RadRichTextBox and pasting in MS Word - the default styles differ.

Right click image > text wrapping > more layout options > text wrapping tab

Word supports "Largest Only" but RichTextBox only has both, left, and right.

An option that enables users to paste any rich text content as a picture of it.

Having a watermark test "This is a\nWatermark" is exported with an empty box instead of a new line to PDF.

This can be reproduced with the provided .docx. In Word the image floats in the empty space below the text but the RichTextBox has it inline and overlapping text.

Removing the rectangle from around the image in the source document has no affect.

Currently floating images specified using the VML shapes are imported as non-floating, for example:

<v:shape id="_x0000_s1026" type="#_x0000_t75" style="height:180.25pt;margin-left:62.25pt;margin-top:1.65pt;position:absolute;width:180.25pt;z-index:251658240" o:preferrelative="t">
        <v:imagedata r:id="rId4" />
</v:shape>

MS Word has support for line numbers (see attached file) but RichTextBox ignores them. Could we get support for Words line numbering options?

When importing from a .docx the RichTextBox is adding a blank line for each continuous section break. You can see this in the attached file - in the RichTextBox there is an extra line between sections that does not exist in the source word document.

The exception is thrown due to an empty byte[] which is applied to the image source.

When opening a document which contains date fields, RadRichTextBox doesn't update their values.
Workaround: Invoke UpdateAllFields() or UpdateField().

Placing the caret in a table cell containing a floating image only results in invisible caret. The formatting symbol of the TableCell is affected by the floating block as well - if there is no other content, the symbol appears under the image. When some text is inserted, the symbol is lost and clicking next to the paragraph end moves the caret in the next/previous table cell.

Pasting style from Word with accent letters in the name is not properly displayed in the Styles Gallery. For example, pasting word style named "Estàèélo1" will be displayed as "Estаийlo1". 

Keyboard commands are not working for controls inside the InlineUIContainer. The reason for this is that RichTextBox is handling them.
The commands are: Left, Right, Backspace, Delete, Tab, Ctrl+C, Ctrl+V among others.

Workaround:
Attach custom event handler to the PreviewEditorKeyDown event of the RichTextBox. This event should set "e.SuppressDefaultAction = true" when the focus is in the InineUIContainer.

This element serves as a frame and allows the element to be positioned as a floating element. More information about it is available in section 22.9.2.18 ST_XAlign (Horizontal Alignment Location) of Open Office XML.

To provide a functionality to crop the image to split its content in multiple pages. This preserves the whole image in the file, but when it is rendered it shows only the cropped image area.