Hex fixed it. Somehow my default bungee perms had been revoked.

Fixed. Turned out to be something to do with his client.

An instance is set up - just depends if we want to use it.

All Minecraft account linking errors should now be fixed. Mainly errors based around us migrating our PHP on the forums, which removed some features and screwed up some others.

Was disabled for testing. Fixed!

Might be worth trying the headless thing...

Fixed by making an animated png (APNG).
Had to get the collection of SVG frames, make a script to convert them all into resized PNGs in sizes 24x24 and 48x48, then use a command to stitch them together into an animated image. Bit more complicated than I first thought!

Not a case of overriding, but the chat plugin doesn't seem to be activating.

I found the issue. It seems that using the wildcard sentence of the form cmi.command.gm.* in Builder's permissions is what caused this. By adding cmi.command.gm.others and setting that to false I was able to prevent Builders, Specialists, etc. from changing other users' gamemode.

After making a few more interesting observations, I have come to the conclusion that the proposed NBT mass-replacer fix would not actually help ease the workload. In fact, it might be harder to do than just going around replacing them by hand.