Not something I’m making a habit of, but every time I’ve tried to upload rather small .gif files (e.g. <5 mb), the site will not accept the files. It provides no error message, just appears to process the image but then give up. If I try and do so during the observation edit page itself, it just gives a 504 Gateway Time-Out page.
I’m fairly sure I’ve seen people upload .gif files before? Or am I imagining things?