As the title. When I'm in a menu such as Arsenal or Arcanes, randomly some of the text and icons (but NOT the images of the mods, the warframe, background items such as orbiter decorations etc) will briefly flicker. The affected bits are all Text and Icons, and that includes the Drain display on mods, the Frame ability icons and the School symbols. It also includes the Arcane images themselves, curiously.
This is new as of the main update today, and extremely unwelcome! I have not changed anything about my setup since I played last night when all was fine.