Add support for the <w:sym /> element, e.g.:

<w:r>
   <w:sym w:font="Wingdings" w:char="F0FC"/>
</w:r> 


From the specification:
"This element specifies the presence of a symbol character at the current location in the runs content. A symbol character is a special character within a runs content which does not use any of the run fonts specified in the rFonts element (17.3.2.26) (or by the style hierarchy).

Instead, this character shall be determined by pulling the character with the hexadecimal value specified in the char attribute from the font specified in the font attribute."

Currently such symbols are skipped during DOCX import.

Possible workaround: These tags are inserted from MS Word when the Symbol dialog in used. If the document is created with MS Word, the user could insert the symbol using the keyboard, in this case the character is inserted as a normal run.