Timur's steps from bug 119530: "Open DOC attachment 52631 [details] from Bug 42112 or .DOCX attachment 144474 [details] from Bug 119529. Double click diagram to open embedded document. Could be open and edited with 6.1, but opens read-only in 6.2+ so we cannot edit it. Not sure if regression or on purpose because editing is wrong. Note: if one has MSO, depending on settings, double click can open MSO but it should open LO, as can be seen where there's no MSO." This was first caused as a side-effect of the following commit: https://cgit.freedesktop.org/libreoffice/core/commit/?id=c1817a5b12da642e365a3ef72b556d33c6e29a76 author Aron Budea <aron.budea@collabora.com> 2017-08-02 03:34:24 +0200 committer Jan Holesovsky <kendy@collabora.com> 2018-07-13 18:25:27 +0200 tdf#110987: type detection, binary Office formats > templates Got fixed by this revert: http://cgit.freedesktop.org/libreoffice/core/commit/?id=1bb732acc6b4d3de94f343041472ccc096723b30 author Aron Budea <aron.budea@collabora.com> 2018-09-08 14:27:41 +0200 committer Aron Budea <aron.budea@collabora.com> 2018-09-08 20:11:10 +0200 Revert "tdf#110987: type detection, binary Office formats > templates" And reintrocued by the following: https://cgit.freedesktop.org/libreoffice/core/commit/?id=65559252f138aada7a55d3c5fe0a932a222d13e0 author Tor Lillqvist <tml@collabora.com> 2019-02-19 11:03:20 +0200 committer Tor Lillqvist <tml@collabora.com> 2019-02-19 18:02:30 +0100 tdf#110987: Don't mis-detect .doc files as .dot