I went in to https://apps.magicjudges.org/reviews/create/ via the link on the sidebar, and got a bunch of “Successfully uploaded a new avatar” spam. When I refreshed the page, this was gone. Notably, I haven’t written a review since I changed my forum avatar, and changing the avatar took a couple tries since I initially uploaded a file that was too big.
One-time incident due to activating the django messages framework with the recent update. Won’t happen more than once per user, and I don’t think there’s an easy way to purge the messages globally.