Mystery extra padding appears above document in embed view

[alykat]

In the embedded version, the document inserts an extra 60px of space between itself and the header. (Not sure if this is coincidental, but the header is also 60px tall.)

http://www.npr.org/blogs/itsallpolitics/2015/04/03/397110609/this-guy-is-running-for-president-and-so-are-more-than-200-others

Extra-weirdly, it's only happening in production — I don't see it on localhost. Also, when the standard DocCloud embed is used (rather than the Paper Trail version), everything is fine:

https://twitter.com/documentcloud/status/584108192008908800

So I wonder if there's something weird on our end? Here's how it looks on production: http://apps.npr.org/documents/document.html?embed=true&id=1701420-form-2-fec

And on localhost: http://127.0.0.1:8000/document.html?embed=true&id=1701420-form-2-fec

[alykat]

From Ted Han: https://twitter.com/knowtheory/status/584121896649658368

In your onDocumentLoad func: viewer's offset top is set a 2nd time after viewer is positioned

[onyxfish]

I've replicated this bug locally, so... something must have changed with DC. It def hasn't always done this and there hasn't been a commit on papertrail in 9 months.

[onyxfish]

Fixed. Not sure what changed, but the simplest fix was to not modify the iframe offset after it's loaded.