In the attached screenshot one can see that there is a difference in the color of the outer pixels of the screen edge. In 17.10 there is a darker grey. Both windows were in the front, when the screenshots were taken. To me, due to the less smooth transition of colors, the screen edges in 17.10 look somewhat rough, ripped.
** Attachment added: "window_edges.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1727269/+attachment/4998650/+files/window_edges.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-themes in Ubuntu. https://bugs.launchpad.net/bugs/1727269 Title: Window buttons and window edges are not rendered/designed cleanly - Ubuntu 17.10 Gnome Status in gnome-shell package in Ubuntu: Triaged Status in ubuntu-themes package in Ubuntu: Triaged Bug description: Window buttons and window edges are not rendered/designed cleanly - Ubuntu 17.10 Gnome. This is really just a cosmetic issue. The window edges (mostly only top left) and window buttons were sharper and clearer in Ubuntu 16.04 und the versions before. The rough window egdges do not appear in all windows, it is especially obvious with Firfox. The impression with the buttons is always present. This is apparent in stock Ubuntu 17.10 on various laptops (Thinkpad x220, Acer Aspire 5253, Macbook Pro late 2010). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1727269/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp