And, if the answer is yes, how can I revert back to how it was before?
I'm asking this because I recently switched to a fresh installation of ubuntu 18.04, and I found that text is rendered slightly differently than before. This leads to strange formatting of some ODT files. I have the same fonts installed on both systems (16.04 and 18.04), and I even tried some live images (Ubuntu 16.04.5, Ubuntu 18.04, Lubuntu 18.04, Lubuntu 18.10), but the result is still the same: text is correctly rendered only on 16.04 (even on the live distribution without the proper font installed).
[EDIT]: added some screenshots to clarify:
Test document 1 on Ubuntu 16.04
Test document 1 on Ubuntu 18.04
Test document 2 on Ubuntu 16.04
Test document 2 on Ubuntu 18.04
It seems like on 18.04 text is a little bit wider: shrinking it by 0.1 inches takes it back in one single line in both documents.
[EDIT2]: please note that the same documents opened on some windows systems are rendered like in Ubuntu 16.04