Hi there!
(@Toby please read, you may find this helpful)
I just noticed another issue: Certain pictures will not upload as avatars (this is in response to @lewisgoddard 's thread)
I decided to look at the Chrome developer console after trying to upload a GIF, (which failed, by the way), and this is what I saw:

And this is what happened on the container for my existing profile image:
(specifically, the loading icon)
It appears that there are two problems:
- The webserver for this Flarum forum is rejecting GIF images for some reason
- There is a parse error in the JavaScript file somewhere (could also be caused by bad JSON, I really can't tell)
Thanks,
Leo