[CentOS] CentOS 7 + GNOME : all icon themes broken after update from CR

I did the update from CR, and have some pretty serious issues.  Until I blew away (by mv to a different name) the .local and .config directory trees, I couldn't log in to GNOME at all.  After doing that, I can log in, but if I do any actual work, GNOME crashes, and abrt-cli from root in vc 2 tells me that gnome-shell got a SIGSEGV. I figure all of the updates aren't in CR yet, so I'm going to pull out my backup machine and work with it until I see if CR gets more updates.  Good thing I've got vacation scheduled for next week!I did quite a few other things in trying to troubleshoot, including attempting a yum distro-sync without CR enabled, which had helped me rollback once before, but not this time.  Once I get my backup machine set up I can post better details.