I usually run CqrlogAlpha on Ubuntu 24.04.4 (Xorg/GTK2), but I recently installed CqrlogImproved on Fedora 44 (Wayland) using `sudo make install`.
Since I have the system font set to "Monaco" via GNOME Tweaks, the application initially launched using the Monaco font. However, after applying my `.ini` file, it reverted to the default "Sans" font—even though this is the same `.ini` file I use on Ubuntu.

0419.ini (used on Xorg Ubuntu 24.04.4 Gtk2)
[Fonts]
UseDefault=0
Buttons=Monaco 11
Edits=Monaco 11
Grids=Monaco 11
QGrids=Monaco 12
eSize=11
bSize=11
gSize=11
qSize=12
GridGreenBar=1
GridBoldTitle=0
GridShowHint=0
GridSmallRows=0
GridDotsInsteadSpaces=0

When I changed "Monaco 11" to just "Monaco" in the `.ini` file, it displayed using the Monaco font as expected.

It seems that "Qt6 might interpret 'Monaco 11' as the literal font name."
Since this involves changing system fonts, I imagine it is an extremely rare case. I also suspect it may be related to how the `.ini` file is generated.

73 de JE8VZK Waka