Installed LibreOffice 5.0 on Windows 8.1 via Ninite. After installation fonts I had installed separately were missing from the system. I know for sure Deja Vu was affected (I use Deja Vu Sans Mono in many terminals and text editors).
LibreOffice is installed
LibreOffice is installed, system configuration altered
Installer should not alter user's system configuration and especially not remove things
Found several posts indicating this behavior was reproduced by other users and isn't new in v5:
Most likely a variation of Bug 76239. In some situations LO installer removes fonts that come with LO (like DejaVu, OpenSymbol etc.) instead of retaining/installing them.
*** This bug has been marked as a duplicate of bug 76239 ***