1) Yeah I didn't test it, it would be easier to just remove the option... ! Don't worry, I'll test it...
2) did you at least read what I wrote about editing the colors or reverting to the default themes for that ? Either edit your bg color or revert, or even better revert 1st, and if it's still not enough for you then edit the bg color manually.
3) Nope obviously, didn't do it (boring and uninteresting, but yeah should be done one day).
Yeah that's what he is already, and he loves that, too bad he can't code to help to fix these things... !