GNOME 3.28 was released a few days back by its developers. I am using Arch Linux and I don't have Testing in Pacman active. I wait for the Gnome packages to be released to the regular (main, extra, community) channels. I am hoping that show-stopping bugs are caught in Testing so users like me don't have to deal with them. Release of GNOME 3.28 packages come with it the possibility of collisions. When updating a big number of packages you expect these things to happen. My 'checkupdates' returned 151 packages ready for upgrades including the linux kernel, gcc and major apps for the GNOME group. It's a total of 480 MB of downloads. The GNOME 3.28 Release Notes are here. You can star files and directories for easier access in the file browser also called nautilus/Files. You can also do this with your contacts, Favorite them, so they appear to be pinned on top of your contact list. You can also try the improved look of the Gnome default font, Cantarell....