iframes and embeds not working

[adamdanielmedia]

Since upgrading to WP 3.5.2 my embedded Bandcamp players, which use frames, aren't displaying correctly.

Example page is www.adamdaniel.com/music/blue-pop

[nacin]

How are you embedding these players? Are you pasting in the iframe/embed code?

[adamdanielmedia]

Tried two ways: pasting in the iframe code, and using a WP.com short code after activing Jetpack.

Bandcamp just upgraded their players. Thinking the bug could be theirs, I just went back to the iframe code for their old players. Same problem, which makes me wonder if it's a WP issue.

[nacin]

If a shortcode is also broken, then this is very likely an issue with Bandcamp. But I was also able to embed an iframe from Bandcamp fine on 3.5.2. I'm guessing you are using a user that has the ability to use unfiltered_HTML (administrator/editor)?

[adamdanielmedia]

I am, yes. I don't use the visual tab at all.

Weird, when I refresh a page with a player, suddenly it renders alright. But on first load, it bugs.

[nacin]

If the first load is a preview, then this is a duplicate of #20148.

[adamdanielmedia]

No, not a preview. Wish it were that easy. :)

[adamdanielmedia]

Even weirder, when I hover over the parts of the Bandcamp player that are rendering, they vanish.

[nacin]

I think it would be best if this gets kicked into the support forums for now: ​http://wordpress.org/support/. If a bug is found, please feel free to re-open.