In contrary to version 2.6.0, the current head version von docx4j.ContentControlBindingExtensions generates an invoice_bound.xml which is not accepted by my version of word 2010 (unknown error at /word/document.xml , line 98, row 0).
This is obviously due to the fact that empty <sdtContent/> elements are not accepted in w:tr/w:sdt: Changing them for <w:sdtContent><w:tc><w:p/></w:tc></w:sdtContent>, the document is working perfectly (interesting enough, changing the first column suffices to "repair" the document, word then omits the second row ...