For your convenience I prepared a list of know limitations of the Import and Export features of both libraries:
RFT to HTML (Import)
bold - supported. I was able to export bold formatting from the provided by you Bold.rtf file. italic - supported
underline - supported
foreground and background colors - supported
table elements - unsupported
images- unsupported
indentations - unsupported
HTML to RTF (export)
bold - supported. italic - supported
underline - unsupported
foreground and background colors - unsupported
table elements - partially supported - table borders are not exported
images- unsupported
indentations - supported
The unsupported scenarios are hard for development and require more time for implementations and testing. Our development is concentrated currently on producing valid XHTML content and the import and export problems are logged with medium priority in our ToDo list.
You should also note that good RTF import and export tools are very expensive and if we integrate such tools in RadEditor, the price of the Telerik suite will be increased a lot. That is why if you are currently not satisfied with the offered by RadEditor RTF functionality, you can search in Internet for another free or paid RTF to HTML importation and HTML to RTF exportation tools and we will help you to integrate them with RadEditor.