The views on this topic are going up exponentially, so I'll post it new so everyone can find the fix.
This is not a Verizon problem, it's not an Android problem, and it's not an HTC Rezound problem. It might be specific to our phones, but it's actually a FACEBOOK problem. The Facebook for Android App updated, and since then, when notifications come in, we get the "Unfortunately" messages, including the one about the System UI.
Here's the fix. Facebook for Android has actually fixed the problem in the newest Beta release. So, at least there's a light at the end of the tunnel. The next real update should fix it and we can put it behind us.
However, in the meantime, if it annoys you enough that you have to fix it now, you can become a Facebook for Android Beta Tester.
Just go to this page, sign in with the Google account that's linked to your Google Play Store on your phone, and join the group. Then uninstall Facebook for Android, go back to the Google Play Store, and reinstall it.
https://groups.google.com/forum/#!forum/facebook-for-android-beta-testers
You'll have the newest Beta version and the problem will be fixed.
Good luck. I hope Verizon picks up this message so that they can stop having people do factory resets on their phones -- that's insane, and doesn't work.