Since the update, there is, it seems to me, a “small” bug with the smoothing of typos on the screen, in the interface of Big on and in Safari: they are not as “fine”That before on my 5K iMac.

Subject: Adjust or Disable Font Smoothing in MacOS Big Surhttps: // www.macrumors.com/How-to/Disable-Font-Smoothing-in-Macos-Big-sur/

Type in the terminal (in order to find more finesse in the drawing of typos on the screen): Defaults -Currenthost Write -G Applefontsmoothing -Int 0...Then restarting the machine does not correct anything (in my eyes) in Safari...

To be confirmed or invalidate.Have a good day...;-)

[Edit] by creating a style sheet file.CSS containing this simple and unique code:

html {-webkit-font-Smoothing: Antialiased;}

...et dans Safari, en le sélectionnant dans “Préférences” –> “Avancées” –> “Feuilles de style”les typos s'affichent alors plus fines et moins baveuses.[/Edit]