Yesterday I let Logos do an update, and afterwards I discovered at least two fonts I had installed on my system were removed. I remember an issue like this when I first upgraded to Logos 6 from Logos 5 some months ago, I'm wondering why it happened again.
The two fonts I know of:
Scheherazade, a font for Arabic script
Charis SIL, a Unicode font containing a number of IPA and other extended Roman characters.
My current Logos version is 6.8 SR1 (6.8.0.0059), I don't know what version I had before, except I know it was 6 of some kind. I believe I upgraded to 6 about a year ago.