When Optifine 1.10 makes staff's messages (and only staff, not supporters or normal people) look like that.
Same problem here While Aikar was busy doing the update, chin snuck into the image server and broke it
For me, I either always use the same, bad, password (which I try to do less) or do a password I probably won't remember anyway (something like M & M's ventilator? :o) and put it into Passpack. That can be a bit of a pain when working on different computers, though, at school, for example.