Mailroom does not render all characters in large emails

[Josh Devenny]

Sent it this: http://pastebin.com/CFfpuKry (29k characters)

It only rendered about 9k characters in the browser: https://mailroom.hipch.at/view/byxwtnxzggj/cbd77361ce44703e70fb574df744a0e71fcbd5bc

[Robert Bergman]

Looks like a problem with the iframe resizer -- the content is there but isn't visible.