Created attachment 126534 [details]
I added a page rendered with both systems. It only contains text to make the file lighter. Problems are worse when the text is mixed with pictures or formulas.

The text line separation is not consistent between different versions and/or operating systems.

I produced a short document in Windows with LibreOffice 4.3 and then needed to use it from a linux box (Ubuntu 14.04) with LibreOffice 4.2. The problem is that the vertical line spacing is not the same.

The problem can be seen in the screen while editing but is not just a screen displaying problem because when I export the document to PDF from either system the result is identical than on the screen (i.e. is different depending on the system).

The document uses Calibri font but this is not the cause of the problems, since I have the font installed in both systems and I added <edit mode="assign" name="embeddedbitmap"><bool>false</bool></edit> to the font configuration file. In addition, to rule out the font problem I swiched some pages to the Carlito font that it is present in both systems and the formatting didn't change at all in neither of the systems. 

The documents look identical in both systems except because there is a small difference in the separation between lines, the linux version being more "compact" than the windows one.