imgur not working

Hi,

It seems that imgur embedding is not working on my forum.
I am running vanilla 2.2 and oembed version 2.0.1
I was previously using the Mediator plugin

The test gallery I use is: http://imgur.com/gallery/qO7EU

When I post this I get a blank line as seen here:
http://i.imgur.com/BW4S8OF.png
When inspecting the html for the post this ls what i see:

<div class="Message">
Testing imgur oembed:<br>
<br>
<a href="http://imgur.com/gallery/qO7EU" target="_blank" rel="nofollow"></a><br>
</div>

I do not get any console errors. oembed works for other services (flickr, TED etc)

What is wrong and how do i fix it? I have tried both firefox and chrome with no extensions.

cheers.