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User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
See http://vmiklos.hu/blog/cloud.html along with Bug 100153 and its counterpart Bug 96052 for a good overview on how to fix OOXML shape issues.
Shapes in OOXML are displayed either as a DrawingML object using the <w:drawing> tag or a VML object using the <w:pict> tag.
Adjusting META bug to reflect that it's a general OOXML shape tracker, not specific to DOCX.
Regényi Balázs committed a patch related to this issue.
It has been pushed to "master":
tdf#77236 DOCX shape export: fix missing solidFill
It will be available in 7.1.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.