Created attachment 98533 [details] position tab page ugly borders Open Writer > Bullets and Numbering > Position or Option tab page. The preview field (SvxNumberingPreview) looks ugly due to some doubled border. As comparison open Writer > Tools > Outline Numbering, which has a nice border. Take this as reference.
Thomas Arnhold committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=65f61d1bf7e59fd643ca3da4a25c8ace8e5507e6 fdo#78321 Bullets and Numbering: SvxNumberingPreview looks ugly 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.