Created attachment 129250 [details] ODT reference file After saving the attached ODT file to DOCX and reloading it, all horizontal borders are black, while in the original document those in the middle of the table are invisible.
Created attachment 129251 [details] Incorrect DOCX file
Confirming with: Version: 5.4.0.0.alpha0+ Build ID: 33f5bc54aaa7fe7aa9335726e30f9c349155e04d CPU Threads: 4; OS Version: Windows 6.2; UI Render: default; TinderBox: Win-x86@62-merge-TDF, Branch:MASTER, Time: 2016-12-01_23:21:05 Locale: nl-NL (nl_NL); Calc: CL and with: Versie: 4.4.6.3 Build ID: e8938fd3328e95dcf59dd64e7facd2c7d67c704d Locale: nl_NL
Also confirming with: Version: 4.3.0.4 Build ID: 62ad5818884a2fc2e5780dd45466868d41009ec0 but not with Versie: 4.2.0.4 Build ID: 05dceb5d363845f2cf968344d7adab8dcfb2ba71
Please search for the existing bugs before confirming. Earliest version can be a good hint, even without bibisect. I'll close as a duplicate of Bug 82177. Please reopen if proved otherwise. *** This bug has been marked as a duplicate of bug 82177 ***