Introduce Split Table Command. 

In MS Word, the command is in Table Tools -> Layout -> Merge -> Split table.

Workaround: Use the RadDocumentEditor API to split the table:
 
var tableRowBox = this.radRichTextBox.Document.CaretPosition.GetCurrentTableRowBox();
if (tableRowBox != null)
{
    this.radRichTextBox.BeginUndoGroup();

    this.radRichTextBox.Document.Selection.Clear();

    var currentRow = tableRowBox.AssociatedTableRow;

    DocumentPosition start = new DocumentPosition(currentRow.GetRootDocument());
    start.MoveToStartOfDocumentElement(currentRow);

    DocumentPosition end = new DocumentPosition(start);
    end.MoveToEndOfDocumentElement(currentRow.Table.Rows.Last);

    this.radRichTextBox.Document.Selection.SetSelectionStart(start);
    this.radRichTextBox.Document.Selection.AddSelectionEnd(end);

    this.radRichTextBox.Cut();

    this.radRichTextBox.InsertParagraph();
    this.radRichTextBox.Paste();

    this.radRichTextBox.EndUndoGroup("Split table");
}
 

Pressing Enter in the first empty cell in the second table of two adjoined tables adds the paragraph between the tables. Instead, the paragraph should be added in the cell.

Steps to reproduce:
- Add two tables.
- Remove the paragraph between them (using the Delete key).
- Add paragraph in the first cell of the second table.
Expected: The paragraph is added in the cell.
Actual: The tables are separated by paragraph.

Inserting a single-cell table with top border is a common workaround for the missing 'horizontal line' functionality. 

Exporting such table to PDF causes wrong result if the intercepting vertical borders are of type None and have smaller thickness.

Attached image outlines the issue.

Workaround: Set the same thickness to the noBorder and to the visible border:
var t = new Telerik.Windows.Documents.Model.Table(1, 1);\
var noBorder = new Telerik.Windows.Documents.Model.Border(3, BorderStyle.None, Colors.Black);
t.Borders = new TableBorders(noBorder, new Telerik.Windows.Documents.Model.Border(3, BorderStyle.Single, Colors.Black), noBorder, noBorder);


Steps to reproduce:
1. Insert table with the following code:

            var t = new Telerik.Windows.Documents.Model.Table(1, 1);
            var noBorder = new Telerik.Windows.Documents.Model.Border(BorderStyle.None);
            t.Borders = new TableBorders(noBorder, new Telerik.Windows.Documents.Model.Border(3, BorderStyle.Single, Colors.Black), noBorder, noBorder);

            this.radRichTextBox.InsertTable(t);
2. Export to PDF

If there is sequence with more than one font info which is not declared in a separate group, they all are concatenated and recorded in the imported fonts as a single one with id from the last one. Here is such a problematic font table group:

{\\fonttbl\\f0\\froman\\fcharset0 Times New Roman;\\f1\\froman\\fcharset0 Times New Roman;\\f2\\froman\\fcharset0 Times New Roman;\\f3\\froman\\fcharset0 Times New Roman;\\f4\\froman\\fcharset0 Times New Roman;\\f5\\froman\\fcharset0 Times New Roman;}

FloatingUIContainers are not cleared from the UI when they are deleted.

Workaround: Recreate UI using the following code:
this.radRichTextBox.ActiveEditorPresenter.RecreateUI();

When the user inserts a table in right-to-left mode, there is no ability to resize its rows/columns. The Table Properties dialog or the Document Ruler still can be used to resize the rows/columns of the Table.

When the document is in Web layout mode (with RadDocument.LayoutMode = "Flow"), and contains multiple sections with comments inside them, the comments are visualized on unexpected places outside of the comments pane, or one over another, hiding other comments.

Add support for importing/exporting macro-enabled document (*.dotm), while preserving the macro content.

In paged layout mode, the caret becomes invisible when the document is scrolled to other page, so that the page with the caret goes out of the view port.

This behavior is also observed when editing, for example when inserting page break or section break.

Paragraphs with applied Normal style are currently exported to RTF with \s0 tag. Instead, this tag could be omitted.

If the document contains a simple field without run inside, the import process fails. 

      <w:fldSimple w:instr="page" w:dirty="true"/>

The same document with a run inside the field does not cause an error

      <w:fldSimple w:instr="page" w:dirty="true">
        <w:r>
          <w:t>1</w:t>
        </w:r>
      </w:fldSimple>

The thmx file extension is associated with Microsoft Office 2007/2010 themes.The themes are stored in *.thmx files, and the built-in Office themes are stored this way in C:\Program Files\Microsoft Office\Document Themes 12\.

The format of a thmx file itself is a ZIP-based format (just like the OpenXML file format).
With the use of the thmx templates, it is possible for users to create uniform looking documents in Word (also in Excel and PowerPoint).

Workaround: Currently, exporting of RadDocument style sheet is supported only to custom XAML format (http://docs.telerik.com/devtools/wpf/controls/radrichtextbox/features/styles/style-sheets ).

If an RTF file contains hyperlink with backslashes in the URI, it is imported broken. Usually, similar hyperlinks are pointing to a local file.
As a workaround, another syntax may be used. For example, "file:///".

When symbol is inserted in underlined word, the underline color of the inserted symbol is always black and doesn't respect the underline color of the word.

Also, when Track Changes is ON and some symbols are inserted, the underline color is black instead of being red. Probably the root cause is the same for both behaviors.

When misspelled word is corrected with the spell checker, and the word is just before the comment range end, the comment range end is moved after the previous word.

Steps to reproduce:
1. Open RichTextBox and type the following sentence: "This sentence has a wrong speling".
2. Select the entire sentence and click "New Comment" button.
3. The comments range start marker displays before "This...." and comment range end marker displays after "...speling"
4. Right click on word "speling" to change "speling" to "spelling"
Result: The spelling gets fixed as expected, but the comment range end moves before the word "spelling".

When doing word-by-word spell checking, the spell checking dialog sometimes covers the misspelled word, so the user cannot see the context of the word without manually moving the dialog. It would be nice if there was a way to change the position of the dialog while spell checking so that it doesn't cover the context of the word.

The method CopyContentFromOverride is a protected method used for copying of inline specific content. This method is not called each time from the CreateElementCopy method.
As a workaround of copying your properties ovveride the CopyPropertiesFromOverride method.

When the paragraph starts with Annotation with SkipPositionBefore = true, TabForward command does not detect that the caret is actually at the beginning of paragraph, and inserts Tab character instead of changing left indent.

Workaround: Subscribe to CommandExecuting and cancel the InsertTextCommand with parameter "\t" if the caret is at such position

Steps to reproduce:
- Insert a paragraph in the document.
- Put the caret at the beginning of the paragraph and insert bookmark (without selection).
- Put the caret at the beginning of the paragraph and press tab.
Expected: Paragraph's Left indent is changed.
Observed: Tab character is inserted.

Currently Find dialog searches only in the editor from which it's started, e.g. if the user presses Ctrl+F in a comment, only the text of this comment is searched.