disable font color change in region

[Bob Clark]

How can I direct emacs *not* to change the color of the *text* in a selected 
region? (It's okay to change the background color.)

I did a recent installation of Ubuntu 14.04. The new emacs version changes the 
color of the text in a region to white to accompany the background color 
change. I don't like this behavior and would like to revert to the previous 
behavior, which was to change the background color only and leave the text 
color alone.

The jpg image at https://drive.google.com/file/d/0B4BAQmmnJQ4HU1hCUUtGb3ZHdTQ 
shows what I mean much better than I can describe it. The emacs session on the 
left is the old behavior (where the colors of "selected" text remain 
unchanged). The emacs window on the right (partially hidden) shows that the the 
selected text has been changed to white. That's what I don't like and would 
like to disable.

Does anyone know how to do that? Thanks.