Yeah, my fix to this issue wasn't as effective as it should have been. jadarnel27 is correct in his synopsis that the opacity isn't properly reset between successive error responses. I've had a fix for this for a while, but I evidently never committed it.
It is resolved in my local environment, so I'll push it out for waffles to grab later this evening.
Update: I've pushed out a fix, now which just removes the fading nonsense outright. I might rework it later, but I need to tidy up some messes I've made with the JavaScript first.
