If the editor is in source mode, you enter invalid XHTML, and then submit the form without leaving the source mode, the editor submits the invalid XHTML value even if the DocType is set to XHTML.
If you change to the normal mode and submit the form, the submitted content is valid XHTML.
Can this be fixed?
If you change to the normal mode and submit the form, the submitted content is valid XHTML.
Can this be fixed?