I have experiences this a few times in the last couple of days. In the bulk uploader, I submit about 10 observations. After working for a while it says something like "failed to load some of your observations." And one of the observations has a red border around it. In every case the offending observation has a comment in it with a user tag, like "@joe_smith." I try repeated to the resubmit and it keeps saying it fails, but in actuality it never fails and I end up with multiple observations that seem complete.