The server up/down/join buttons also appear and change color when the mouse moves over the buttons.
Confirmed in 1.8.7: http://www.youtube.com/watch?v=wtBS62Xyoa4 (this is why bugs shouldn't become features... "zero-tick pistons"? That sounds more like a hack than something intentional.)
Confirmed for 1.8.1-pre4.
The title is incorrect. Spectators can travel to the nether by teleporting to that player (https://twitter.com/Dinnerbone/status/464386873365114880), it should be "Specators can't use nether portals". But I don't think it's supposed to work like that, because nothing (except commands) can interact with spectators. Also, dinnerbone said (https://twitter.com/Dinnerbone/status/428941132513705984) specators are supposed to be able to pass through all blocks, which wouldn't be possible with portals teleporting you away.
Maybe add all keyboards to the description/environment for easier access? @Alejandro Bentivengo
This is very inconsistent to reproduce. Sometimes when I have a bad session ID the error shows up, sometimes it doesn't.
This is not a duplicate of MC-64282! That one is about the error itself, this is about how the client tries to get the server list even if it already failed to authorize, and how it doesn't display the error in the interface, only in the console!
Reproduced. When the beacon isn't in the FOV, the beam disappears.
@Marcono1234 No. Reproducing this issue does not require feeding the horse.