Scribus 1.4.8 on Linux Ubuntu
I use 4 fonts
FreeSerif Regular
FreeSerif Italic
FreeSans Regular
FreeSans Bold
At PDF output, I have at all my new documents all of them in the outline box.
Just made a PDF, made small changes, made an other PDF.
The file size jumped from 1,8 to 4,2 MB.
I found, that FreeSerif Regular is suddenly in the embed box, arrows to move greyed disabled.
With some tricks, it was possible to bring FreeSerif Regular again to the Outline box, PDF again at 1,8 MB,
but again, FreeSerif Regular jumed in the embed box.