So I let this fall by the wayside for a while, but I just wanted to say:

It is absolutely unacceptable that we should have to wait until after 2.2 to have a background transparency slider. This is an obscenely simple UI feature that provides far more benefit than the effort it takes to implement it. Get your shit together, SE, and help us, or do you just not freaking care anymore?

(Yes, I'm upset. I'm tired of dealing with headaches and being unable to follow chats. I'm tired of having to stick myself somewhere dark and not busy just to talk to people. I'm tired of SE putting something off that could be done in a matter of hours.)