I'm using Fedora Core 26 and I have problems with some icons in some programs. I'm using an old Nvidia GeForce GTS 8800 and the nouveau drivers. Seems to only affect toolbar icons of GTK programs. The Chromium I'm using to post this is unaffected, as is the GNOME Desktop.
On the same machine. I'm also using Arch and Ubuntu 17.04 (both w/ proprietary drivers) and the glitch only appears in Fedora Core, so perhaps this is a gtk/nouveau bug.
Is there a fix for this? I have tried googling but I can't find anything relevant.
*** Edit: I get the same glitch when installing gparted to the live USB environment, so I'm now strongly leaning towards a gtk/nouveaue issue, possibly only when triggered by older NVidia h/w. Will report back from installed Fedora Core ASAP.
*** Edit: Same bug when booting into freshly installed Fedora Core 26. More evidence towards the gtk/nouveau + older NVidia h/w hypothesis.