overflow: hidden; doesn't work on Chrome with IFRAMEs?

Question

I have an IFRAME with overflows hidden in the css and html. It works in Firefox, but not Chrome/Safari

Why is this?

Answer 1

After a pretty big research I've done on this subject I would like to post my answer, which I suggest, could be an addition to Joonas's answer:

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I think, both scrolling and overflow:hidden should be provided, although this solution won't work in a combination of Chrome and HTML5 doctype. scrolling attribute is deprecated in HTML5 and the overflow property doesn't affect iframes in Chrome. I assume, the latter is a bug, since the HTML5 specification says clearly:

In addition, HTML5 has none of the presentational attributes that were in HTML4 as their functions are better handled by CSS:
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- nowrap attribute on td and th.
- rules attribute on table.
- scrolling attribute on iframe.
- size attribute on hr.
- type attribute on li, and ul.
(...)

It's said clearly - in HTML5 scrolling should be replaced by CSS overflow.