The "Disable Advertising" and "Ads Disabled" checkboxes always appear in the slashbox panel, even when simplified layouts are selected and slashboxes are disabled. You can almost get a great mobile-device layout by choosing some simplified layout options -- alas, this checkbox's always-on-the-right placement is literally the only thing preventing this when logged in, since it squeezes the main content towards the left.
(Seems to be a simple layout issue, not a CSS or HTML bug; it happens in Firefox and IE at least.)
