When isError is false, text indicating such appears on the "My Contributions" and "Latest Activity" tables.
When I turn the database off, the Error messages appear as expected, then disappear on page refresh (we're left with empty forms, since the database is still down, but no error messages).
Upon refreshing the page a second time, the error messages will flash for a second and vanish.
The front-end periodically retries the requests, and occasionally the error messages will reappear upon a failure, but there seems to be no pattern to it.
I'm not sure how important it is to get all of this sorted out immediately; in the deployment environment I'd assume that if one piece of the puzzle is down, they'll all be down. At the very least, we should get rid of the extraneous messages that are appearing on the Dashboard.