Anything about the weird dark mode problem I've been having?
It only started happening in 1.0.216.
I can reliably trigger it by setting Windows Personalize > Colours > Choose your Colour: Custom > Default App Mode: Light while Calibre is in dark mode.
I noticed this in the note_viewer_dialog.py:
	Code:
	from calibre.gui2.palette import windows_is_system_dark_mode_enabled, linux_is_system_dark_mode_enabled
 I think if you figure out to change that to follow Calibre instead of system that may fix it.
EDIT: 
In this thread: 
QApplication.instance().is_dark_theme 