Check for updated video drivers. More RAM wouldn't hurt either.
Thanks for trying to help, but I already mentioned that I updated my graphics drivers to no effect.
I know more RAM wouldn't hurt, but I have double the minimum required for CC 2015 and I haven't had any problems running the program before this update. So I highly suspect that is not what's causing this issue.
Anyone else have any ideas?
Which workspace? Some people who installed the new Start workspace which arrived with the InDesign CC 2015.2 update the end of November have complained of flickering. It's solved by turning off that feature in Preferences > General > Uncheck Show Start Workspace.
The latest update for InDesign arrived November 30, 2015. Maybe you missed it until February.
Thanks Steve, that did the trick!
It was a little tricky accessing Preferences when I couldn't pull down any of the menus, but after finding the correct keyboard shortcuts I was able to test that fix and it seems to have worked. I spent hours Googling this and couldn't find an answer, so I really appreciate that.
The keyboard shortcut Cmd/Ctrl + K opens Preferences if you should have to do it again.