[CentOS] anybody else had this problem since the CR updates?

Sun Aug 27 11:33:36 UTC 2017
Liam O'Toole <liam.p.otoole at gmail.com>

On 2017-08-27, Fred Smith
<fredex at fcshome.stoneham.ma.us> wrote:
> I'm running Mate on my C7 boxen, a desktop and a netbook.\
> Mate comes from epel, so it's probably not a CentOS problem, but lemme
> ask here in case anybody else has seen it:
> some tools (nm, pavucontrol, and possibly others I haven't noted down)
> no longer have the correct formatting on screen. there are no
> backgrounds, i.e., backgrounds that define areas of the screen by
> shading or borders.  clickable text tends to be jammed together.
> pavucontrol has no sliders for any of the level controls.
> an example, at the top of pavucontrol it has no visible tabs, just the
> text:
> 	PlaybackRecordingOutput DevicesInput DevicesConfiguration
> spaced as shown. they work when you click them, however. but since
> none of the sliders are visible (and I can't find 'em by randomly
> poking around with the mouse pointer) it's a little hard to use. :(
> If I can find a place to post some screenshots, I'll try the  posting
> a note on the epel IRC.
> Thanks in advance!

Mate in epel still uses gtk2, whereas the applications you mention use
gtk3. So I'd say you need to choose a theme with support for both.
Adwaita is a good choice in that regard.