I use many different fonts in my documents and accurate rendering is critical to my work. So far, I’ve been very happy with LibreOffice’s layout scheme, but there are some issues which seem specific to the Mac platform.
The main problem is that, sometimes, when using different styles (e. g. roman and italics) in the same sentence, the glyphs are not accurately rendered and appear deformed. Sometimes, glyphs in the italics fonts will “lean” on the roman glyphs next to them and add some unusual white space, possibly hiding parts of the roman font glyph. This also happens with whitespace characters, specifically with non-breaking spaces.
I’ve heard that LibreOffice on the Mac used ATSUI instead of Core Text for text rendering: is this the source of the problem?
Finally, the strangest part (from my point of view, at least) is that the deformed glyphs still appear deformed in a PDF exported from the .odt file! This seems to show that the appearance of the PDF explicitly depends on the visible state of the document at the time of exporting. Could anyone explain this behavior? Is it meant to be that way or not?