(f-40, last patched Nov. 14; gnome; stand-alone workstation) (nvidia geforce gtx 660; I use the rpmfusion driver)

Some of the GUI applications on my workstation are difficult to nearly impossible to use.  Parts of them are invisible or on-and-off invisible.  This started after I upgraded to f-40 last month.  A few examples:

- LibreOffice.  The icons below the main menu are very light gray; the background is slightly lighter gray.  The icons at the bottom are completely invisible.

- gnome file browser.  Text below file/directory icons are invisible; scrolling makes the text visible; clicking a file/directory icon makes the text disappear.  Moving the cursor around makes text both appear and disappear.  Text in the left side bar is invisible.

- settings (gnome's).  Text is invisible.Moving the cursor around makes text appear.  Clicking makes all visible text disappear.

- system monitor (gnome's).  Some text is invisible when a tab is selected.  Clicking a line makes invisible text visible.

A few examples seem (so far) to not have been affected by last month's upgrade to f-40: * gnome terminal. * Thunderbird. * Firefox, * caja file browser. * gvim gui. * VLC.

How do I fix this?