User blog comment:Undead.exe/Breakpoint 0, Typography 0/@comment-11291792-20150519153529/@comment-452-20150519154621

I'm unsure which margins you're specifically talking about, but:
 * Small tweaks to margins and padding have always been allowed.
 * Covering/moving advertisements in any way has always not been allowed.

Completely undoing today's update will change how much of the background advertisement is covered.