Created attachment 610187 [details]
bug demonstration video
Description of problem:
See the video. I can reproduce that on VM and bare metal, and with radeon, nouveau and qxl drivers. Firstboot bug or gtk bug? But I haven't seen it in another application except firstboot.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. fill fields
2. use Tab and Shift+Tab to cycle through them
Most of advanced users will understand this is a rendering bug, but some general users might be confused. Proposing as F18 NTH.
Is it still happening? There is nothing I can to about it in firstboot, so if it is a rendering bug, please reassign to Gtk.
It no longer displays graphical glitches, closing.