Created attachment 94558 [details]
Please see screenshot.
First reproducible with 4.2 alpha build, opening a bug for this, because it seems skipped by mistake when other variants are present.
according to this link ( https://wiki.documentfoundation.org/ReleaseNotes/4.2#Flat_icons_.28Sifr.29 ) the authors of the theme are Issa Alkurtas, Norah Abanumay, Pavel Haratický and Ahmad Harthi.
I try to add them to CC list.
Confirmed with 4.2.1 on OSX 10.9.1. NEW
The problem here is the for some strange reason, the sifr had 3 line spacing icons with filenames lc_spacepara1, lc_spacepara2, and lc_spacepara3 and other icon sets them as lc_spacepara1, lc_spacepara15 and lc_spacepara2.
So i've just renamed the files according. https://gerrit.libreoffice.org/#/c/12008/
Added to 4.3 https://gerrit.libreoffice.org/12016
and 4.2 https://gerrit.libreoffice.org/#/c/12017/
Integrated in the 4.3 series: http://cgit.freedesktop.org/libreoffice/core/commit/?h=libreoffice-4-3&id=090005af993be6aa5dc1375ab1f06d5520014a93
For 4.2, no more releases are planned.
This bug fix comes with LibreOffice 4.4 and is mentioned in the release notes (https://wiki.documentfoundation.org/ReleaseNotes/4.4)