The export to RTF feature of RadEditor, which is based on a free third party exporter tool, does not support exportation of table elements. Unfortunately, it is not an easy task to provide this feature in the current build of the editor and I cannot provide a firm estimate when this feature will be implemented.
Here are more details about the RTF export and import:
RadEditor uses two different free libraries to provide Import to RTF
and Export to RTF
The first one used to provide RFT to HTML
importation is available in this CodeProject's article: http://www.codeproject.com/KB/recipes/RtfConverter.aspx
The library used for HTML to RTF
exportation is available here http://www.codeproject.com/KB/recipes/RtfConverter.aspx
As you can see both libraries are written by different developers and they are not fully compatible with each other.
Here is a list of know limitations of the Import and Export features of both libraries:
RFT to HTML (Import)
- supported. I was able to export bold formatting from the provided by you Bold.rtf file.
underline - supported
foreground and background colors - supported
table elements - unsupported
indentations - unsupported
HTML to RTF (export)
underline - unsupported
foreground and background colors - unsupported
table elements - partially supported
indentations - supported
the Telerik team