See test file and its SVG export with missing line joint and line cap attributes.
Created attachment 88504 [details] ODG test file (rectangle with miter line joint and line with rounded line cap)
Created attachment 88505 [details] bad SVG export
Laszlo Nemeth committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=a2b59a51274ccf29ce1bd77a9330c6e3136fc590 fdo#71137 fix linecap and linejoint in SVG export 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.