I have put your two screenshots side by side, flipped, and zoomed in. See attached.
It appears there is no difference in the window decoration edges (although the different wallpaper colour behind makes them look different). There is definitely a change in the X button design that is now visible. ** Attachment added: "decor.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1727269/+attachment/4997372/+files/decor.png ** Changed in: gnome-shell (Ubuntu) Status: Incomplete => Triaged ** Also affects: ubuntu-themes (Ubuntu) Importance: Undecided Status: New ** Changed in: ubuntu-themes (Ubuntu) Importance: Undecided => Low ** Changed in: ubuntu-themes (Ubuntu) Status: New => Triaged -- 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