I am on Arch Linux using GNOME 3.20 and using Flat Plat 3.20 20160404. checkboxes in Firefox are not visible when they are not checked (although they are visible when they are checked).
Thanks
Yes and radio buttons are not supposed to be like this

鈥nd the scrollbar seems to have disappeared as well (only on FirefoxNightly).
Maybe it's a Firefox bug due to the whole gtk3.20 changes ?
Libreoffice also experienced inconsistency with gtk3.20 .
===updated wrong pic===

Clear now. Libreoffice and Firefox are still using gtk2 (somehow managed to take on gtk3 themes). However gtk3.20 upgrade broke the consistency. Forcing the gtk3.20 theme on those apps won't make the elements show correctly.
the checkboxes are actually white squares. However the white background makes them invisible

checkboxes in light theme are still white (should be dark)
bummer, no fix?
bump, any signs of proper fix?
I am so sorry for the late response.
I was fixed the phenomenon in which buttons turns white.
But it is hard to resolve the weird status of the radiobuttons at the moment. (unless it sacrifice animations...)
Gnome 3.18
Radio buttons:
LibreOffice:

Check boxes:
LibreOffice:

Terminal:

Should be same as Terminal's.
@sharifzadesina It seems that the size of checkboxes is fixed to 15px on LibreOffice of the GTK2 version.
On LibreOffice of the GTK3 version (5.2 or higher), it was solved, so I would like you to wait it.
Great ! :)
experiencing same issue under certain qt4/qt5 dependant apps.
See attached screen cap.

@nathaneltitane Hmm, okay, I'll reconsider about check/radiobuttons sizing. Thanks. 馃憤
Now radiobuttons issues on Firefox is almost gone (except with dark variant).
This problem still remains in LibreOffice, but I'd like to clarify the (duplicate) issues, so I opened a new issue as #122 and #123.
So I'd like to close this now, but thank you for your report. :)
Most helpful comment
Yes and radio buttons are not supposed to be like this
