Also, if you install 3.5 from the libreoffice site and it looks terrible. You may want to investigate the following. If you run libreoffice from the command line and you get the following error
then what's happening is that it is using an internal library named libstdc++.so.6. And your toolbar is going to look like this
(soffice:3748): Gtk-WARNING **: /opt/libreoffice3.5/program/../ure-link/lib/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by /usr/lib64/gtk-2.0/2.10.0/engines/liboxygen-gtk.so)
In order to remedy the problem you can initiate the following command. (Word of caution: I have not determined if this breaks anything else in the program but initial tests have not introduced any more errors)
this will allow the gtk look and feel to load correctly and your toolbar should look like this.
sudo mv /opt/libreoffice3.5/ure/lib/libstdc++.so.6 /opt/libreoffice3.5/ure/lib/libstdc++.so.6.old
IMHO When it doesn't load the correct look and feel there seems to be some heavy lines introduced between sets of icons making the program feel as though it's running on win95.