Created attachment 171644 [details] Libreoffice Writer 7.2.2 Overline Error Demonstration The problem only occur when the files is saved on Word 2007. If it is saved on ODG file format it will be fine.
I can confirm with Version: 7.2.0.0.alpha0+ / LibreOffice Community Build ID: d4f116d9576453f5974eb63db37a33c59ac53bc9 CPU threads: 4; OS: Linux 5.8; UI render: default; VCL: gtk3 Locale: cs-CZ (cs_CZ.UTF-8); UI: en-US Calc: threaded and Version 4.1.0.0.alpha0+ (Build ID: efca6f15609322f62a35619619a6d5fe5c9bd5a)
Does MS Word even know about overlines? I don't see it in Word 2003. NOTE: OP is not really referring specifically to Word 2007 at all. The video just showed savnig IN LIBREOFFICE to DOCX format. Need to check if modern Word knows about overline. Otherwise this is NOTABUG.
Word has no concept of overline.
*** This bug has been marked as a duplicate of bug 94558 ***