In any module (Writer, Calc, ...), the Organizer tab of a Style dialog (e.g., Paragraph/Character in Writer) shows font sizes as whole pts, regardless of if actual size is whole or not. To reproduce, open a Style dialog, and set a font size to 10,5 pt, then look at the "Contains" string on Organizer tab. It will show "11 pt", not "10,5 pt".
https://gerrit.libreoffice.org/50033
Mike Kaganski committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=3fcf374de426102da36f5b07fda5b0534de62233 tdf#115874: show non-zero fraction part for pts It will be available in 6.1.0. 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.