Here is an example:
This does not happen in all windows, only in some (it also happens in Ubuntu Tweak, and for the text in the tabs of Terminal).
I installed the MediterraneanNight theme when this occurred. I've found some other people who have had similar problems but the only solution I've been able to find is to change the
gtk.css files in the theme folders. I've checked those and have verified that the text_color is set to #282828, which is a dark grey, not white.
/usr/share/themes/MediteranneanLightDarkest/gtk-2.0/gtkrc /usr/share/themes/MediteranneanLightDarkest/gtk-3.0/gtk.css /usr/share/themes/MediteranneanLightDarkest/gtk-3.0/settings.ini
And all of them report that
#282828. The only thing that is set to
tooltip_fg_color but I don't believe those are the problem since those are the same as in the Ambiance theme, which is not having this same problem.
Here is a link to the theme for reference: http://gnome-look.org/content/show.php/MediterraneanNight+Series?content=156782
And if it's relevant I am using GNOME 3 on Ubuntu 12.04
EDIT: Also let me add that I am looking for a solution that will fix the text color and let me keep my theme. I can fix the problem by switching to a different theme, but I'd rather not have to do that.