You might be having issues with things like image uploads and notifications not appearing (among other things).
We've exhausted our server resources (nice problem to have!) and are working on upgrading now.
Please bear with us...
I hope the upgrade guess smoothly.
How many users do you have and what kind of servers are you currently running?
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.