Created attachment 66027 [details] The slider I've KDE 4.8.4, Debian Sid and LiBo taken from Experimental. The new bottom status bar has the zoom slider without icons (seems that if you blindly click over where they are supposed to be, they work even if you don't see them) and the slider itself is just an horizontal line with two small vertical ones, probably the "100% zoom" and the current position, that in any case is impossible to manipulate
I've updated my system, and also some libreoffice package that were at 3.5 version (libreoffice-l10n-it libreoffice-report-builder-bin libreoffice-help-it libreoffice-filter-mobiledev libreoffice-emailmerge) and now, don't know because of what of these actions, the slider works perfectly and the zoom icons are there. Sorry for the noise!