I'm using the following:
LibreOffice 4.3 Beta on 64 bit Ubuntu 12.04.3 LTS (downloaded to replace
Ubuntu's default)
LibreOffice 4.2.3.3 on 64 bit Ubuntu 14.04 LTS. (Ubuntu's default
installation)
I was using LibreOffice 4.3 Beta on 64 bit Ubuntu 12.04.3 LTS, and recently
installed Ubuntu 14.04 in a separate partition to try it out before taking
the plunge. On Ubuntu 14.04, the stock LibreOffice 4.2.3.3 was installed by
default and I used it.
I believe there is a bug in the Ubuntu version of LibreOffice 4.2.3.3 as it
doesn't appear in my 4.3 Beta, and it doesn't seem to be related to the
different operating system.
In the same document from a shared partition, if there is a multi-cell
table, and the border lines on any or all cells are turned off, they are
still displayed in the 4.2.3.3 print preview, although they are not printed
on paper or in a pdf export. In the 4.3 beta, the print preview is fine.
I was going to report this as a bug, but kept ending up at different sites
for some reason, so gave up. In any case, it would probably be better if
someone else confirms this behavior before bothering the developers who I'm
sure have more pressing things to worry about.
Thanks.