I was able to add things like Adsense scripts very easily using the "embed" option before but after the site got corrupted and deleted, in the new site, this option just hangs with a wait message. The web part option does nothing either so can't use a content editor wp to add a link to scripts.
And of course the html source option strips scripts out and helpfully suggests using the embed button - which of course doesn't work.
I have no idea if Preview accounts were converted or not - the 2013 launch is so confusing it's hard to know what's going on -, but how do I get back the ability to add scripts?
The workarounds for the previous SP version obviously aren't available either so it's critical the embed option work as it did before.