Open https://bugs.documentfoundation.org/attachment.cgi?id=114460 in LibreOffice, save it, open it again, and notice that triangles are skewed. But this re-saved document looks OK in PowerPoint Viewer 2013, so it is rather an import problem. Original triangle: <a:prstGeom prst="triangle"> <a:avLst/> </a:prstGeom> Exported triangle: <a:prstGeom prst="triangle"> <a:avLst> <a:gd name="adj" fmla="val 50000"/> </a:avLst> </a:prstGeom> So at first look it seems we have an unnecessary <a:gd name="adj" fmla="val 50000"/> adjustment value in export, but PowerPoint Viewer and LibreOffice 4.2 does not have a problem with it, so probably this value is good.
I can confirm the triangles are skewed on roundtrip.
Also can confirm that removing "<a:gd name="adj" fmla="val 50000"/>" in slide1.xml fixes the skewed rendering in Impress. Does this code add anything? If not, shouldn't the exporter be fixed to not include it?
Word is happy with the exported file, therefore the problem is in our importer. I think I found the problem and will push the fix shortly.
Andras Timar committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=da0a44b415f630ce39617b8c8f0c366177a7705e tdf#91429 do not convert ooxml preset shape modifier values It will be available in 5.0.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Andras Timar committed a patch related to this issue. It has been pushed to "libreoffice-5-0": http://cgit.freedesktop.org/libreoffice/core/commit/?id=383b82ef8e2c36415cf1039885bef4d44db412ac&h=libreoffice-5-0 tdf#91429 do not convert ooxml preset shape modifier values It will be available in 5.0.0.0.beta2. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.